【NebulaGraph】查询案例
0. 基本信息
0.1 基本查询语句
SHOW SPACES
SHOW TAGS;
DESCRIBE TAG `player`;
DESCRIBE TAG `team`;
SHOW EDGES;
DESCRIBE EDGE `follow`;
DESCRIBE EDGE `serve`;
# 分页查询
MATCH (n:player)
RETURN
id(n),
n.`player`.`name` as `name`,
n.`player`.`age` as `age`
SKIP 0 LIMIT 100;
MATCH (n:player)
RETURN
id(n),
n.`player`.`name` as `name`,
n.`player`.`age` as `age`
SKIP 100 LIMIT 100;
DROP TAG `player`;
MATCH (src)-[r:follow]->(dst)
RETURN
id(src),
rank(r),
id(dst),
r.`degree` as `degree`
SKIP 0 LIMIT 100;
MATCH (src)-[r:follow]->(dst)
RETURN
id(src),
rank(r),
id(dst),
r.`degree` as `degree`
SKIP 100 LIMIT 100;
DROP EDGE `follow`;
展示索引 SHOW TAG INDEXES;
创建索引 CREATE TAG INDEX
CREATE TAG INDEX `i_player_age` ON `player`(`age`);
CREATE TAG INDEX `i_player_age` ON `player`(`age`);
重建索引 REBUILD TAG INDEX `i_player_age`;
删除索引 DROP TAG INDEX `i_player_age`;
添加数据 INSERT VERTEX `player` (name, age)VALUES 'player999': ('Kobe', 41);
编辑单行数据 UPDATE VERTEX ON `player` 'player999'SET age = 18
删除节点 DELETE VERTEX 'player999';
创建边的索引 CREATE EDGE INDEX `i_follow` ON `follow`();
重建索引 REBUILD EDGE INDEX `i_follow`;
删除索引 DROP EDGE INDEX `i_follow`;
插入边 INSERT EDGE `follow` (degree)VALUES 'player999'->'player888'@0: (1);
删除边 DELETE EDGE `follow` 'player999'->'player888'@0;
1. 数据准备
drop space basketballplayer;
create space basketballplayer(partition_num=10,replica_factor=1,vid_type=fixed_string(32));
:sleep 20
use basketballplayer;
create tag player(name string,age int);
create tag team(name string);
create edge serve(start_year int,end_year int);
create edge follow(degree int);
:sleep 20
create tag index player_index_0 on player();
create tag index player_index_1 on player(name(20));
:sleep 20
insert vertex player(name,age) values "player100":("Tim Duncan", 42);
insert vertex player(name,age) values "player101":("Tony Parker", 36);
insert vertex player(name,age) values "player102":("LaMarcus Aldridge", 33);
insert vertex player(name,age) values "player103":("Rudy Gay", 32);
insert vertex player(name,age) values "player104":("Marco Belinelli", 32);
insert vertex player(name,age) values "player105":("Danny Green", 31);
insert vertex player(name,age) values "player106":("Kyle Anderson", 25);
insert vertex player(name,age) values "player107":("Aron Baynes", 32);
insert vertex player(name,age) values "player108":("Boris Diaw", 36);
insert vertex player(name,age) values "player109":("Tiago Splitter", 34);
insert vertex player(name,age) values "player110":("Cory Joseph", 27);
insert vertex player(name,age) values "player111":("David West", 38);
insert vertex player(name,age) values "player112":("Jonathon Simmons", 29);
insert vertex player(name,age) values "player113":("Dejounte Murray", 29);
insert vertex player(name,age) values "player114":("Tracy McGrady", 39);
insert vertex player(name,age) values "player115":("Kobe Bryant", 40);
insert vertex player(name,age) values "player116":("LeBron James", 34);
insert vertex player(name,age) values "player117":("Stephen Curry", 31);
insert vertex player(name,age) values "player118":("Russell Westbrook", 30);
insert vertex player(name,age) values "player119":("Kevin Durant", 30);
insert vertex player(name,age) values "player120":("James Harden", 29);
insert vertex player(name,age) values "player121":("Chris Paul", 33);
insert vertex player(name,age) values "player122":("DeAndre Jordan", 30);
insert vertex player(name,age) values "player123":("Ricky Rubio", 28);
insert vertex player(name,age) values "player124":("Rajon Rondo", 33);
insert vertex player(name,age) values "player125":("Manu Ginobili", 41);
insert vertex player(name,age) values "player126":("Kyrie Irving", 26);
insert vertex player(name,age) values "player127":("Vince Carter", 42);
insert vertex player(name,age) values "player128":("Carmelo Anthony", 34);
insert vertex player(name,age) values "player129":("Dwyane Wade", 37);
insert vertex player(name,age) values "player130":("Joel Embiid", 25);
insert vertex player(name,age) values "player131":("Paul George", 28);
insert vertex player(name,age) values "player132":("Giannis Antetokounmpo", 24);
insert vertex player(name,age) values "player133":("Yao Ming", 38);
insert vertex player(name,age) values "player134":("Blake Griffin", 30);
insert vertex player(name,age) values "player135":("Damian Lillard", 28);
insert vertex player(name,age) values "player136":("Steve Nash", 45);
insert vertex player(name,age) values "player137":("Dirk Nowitzki", 40);
insert vertex player(name,age) values "player138":("Paul Gasol", 38);
insert vertex player(name,age) values "player139":("Marc Gasol", 34);
insert vertex player(name,age) values "player140":("Grant Hill", 46);
insert vertex player(name,age) values "player141":("Ray Allen", 43);
insert vertex player(name,age) values "player142":("Klay Thompson", 29);
insert vertex player(name,age) values "player143":("Kristaps Porzingis", 23);
insert vertex player(name,age) values "player144":("Shaquille O'Neal", 47);
insert vertex player(name,age) values "player145":("JaVale McGee", 31);
insert vertex player(name,age) values "player146":("Dwight Howard", 33);
insert vertex player(name,age) values "player147":("Amar'e Stoudemire", 36);
insert vertex player(name,age) values "player148":("Jason Kidd", 45);
insert vertex player(name,age) values "player149":("Ben Simmons", 22);
insert vertex player(name,age) values "player150":("Luka Doncic", 20);
insert vertex team(name) values "team200":("Warriors");
insert vertex team(name) values "team201":("Nuggets");
insert vertex team(name) values "team202":("Rockets");
insert vertex team(name) values "team203":("Trail Blazers");
insert vertex team(name) values "team204":("Spurs");
insert vertex team(name) values "team205":("Thunders");
insert vertex team(name) values "team206":("Jazz");
insert vertex team(name) values "team207":("Clippers");
insert vertex team(name) values "team208":("Kings");
insert vertex team(name) values "team209":("Timberwolves");
insert vertex team(name) values "team210":("Lakers");
insert vertex team(name) values "team211":("Pelicans");
insert vertex team(name) values "team212":("Grizzlies");
insert vertex team(name) values "team213":("Mavericks");
insert vertex team(name) values "team214":("Suns");
insert vertex team(name) values "team215":("Hornets");
insert vertex team(name) values "team216":("Cavaliers");
insert vertex team(name) values "team217":("Celtics");
insert vertex team(name) values "team218":("Raptors");
insert vertex team(name) values "team219":("76ers");
insert vertex team(name) values "team220":("Pacers");
insert vertex team(name) values "team221":("Bulls");
insert vertex team(name) values "team222":("Hawks");
insert vertex team(name) values "team223":("Knicks");
insert vertex team(name) values "team224":("Pistons");
insert vertex team(name) values "team225":("Bucks");
insert vertex team(name) values "team226":("Magic");
insert vertex team(name) values "team227":("Nets");
insert vertex team(name) values "team228":("Wizards");
insert vertex team(name) values "team229":("Heat");
insert edge follow(degree) values "player100"->"player101":(95);
insert edge follow(degree) values "player100"->"player125":(95);
insert edge follow(degree) values "player101"->"player100":(95);
insert edge follow(degree) values "player101"->"player125":(95);
insert edge follow(degree) values "player101"->"player102":(90);
insert edge follow(degree) values "player125"->"player100":(90);
insert edge follow(degree) values "player102"->"player101":(75);
insert edge follow(degree) values "player102"->"player100":(75);
insert edge follow(degree) values "player103"->"player102":(70);
insert edge follow(degree) values "player104"->"player101":(50);
insert edge follow(degree) values "player104"->"player100":(55);
insert edge follow(degree) values "player104"->"player105":(60);
insert edge follow(degree) values "player105"->"player104":(83);
insert edge follow(degree) values "player105"->"player100":(70);
insert edge follow(degree) values "player105"->"player116":(80);
insert edge follow(degree) values "player107"->"player100":(80);
insert edge follow(degree) values "player108"->"player101":(80);
insert edge follow(degree) values "player108"->"player100":(80);
insert edge follow(degree) values "player109"->"player100":(80);
insert edge follow(degree) values "player109"->"player125":(90);
insert edge follow(degree) values "player113"->"player100":(99);
insert edge follow(degree) values "player113"->"player101":(99);
insert edge follow(degree) values "player113"->"player125":(99);
insert edge follow(degree) values "player113"->"player104":(99);
insert edge follow(degree) values "player113"->"player105":(99);
insert edge follow(degree) values "player113"->"player116":(99);
insert edge follow(degree) values "player113"->"player118":(99);
insert edge follow(degree) values "player113"->"player121":(99);
insert edge follow(degree) values "player113"->"player106":(99);
insert edge follow(degree) values "player113"->"player119":(99);
insert edge follow(degree) values "player113"->"player120":(99);
insert edge follow(degree) values "player114"->"player115":(90);
insert edge follow(degree) values "player114"->"player140":(90);
insert edge follow(degree) values "player114"->"player103":(90);
insert edge follow(degree) values "player116"->"player141":(100);
insert edge follow(degree) values "player118"->"player131":(90);
insert edge follow(degree) values "player118"->"player120":(90);
insert edge follow(degree) values "player120"->"player118":(80);
insert edge follow(degree) values "player121"->"player116":(90);
insert edge follow(degree) values "player121"->"player128":(90);
insert edge follow(degree) values "player121"->"player129":(90);
insert edge follow(degree) values "player124"->"player141":(-1);
insert edge follow(degree) values "player126"->"player116":(13);
insert edge follow(degree) values "player127"->"player114":(90);
insert edge follow(degree) values "player127"->"player148":(70);
insert edge follow(degree) values "player128"->"player116":(90);
insert edge follow(degree) values "player128"->"player121":(90);
insert edge follow(degree) values "player128"->"player129":(90);
insert edge follow(degree) values "player129"->"player116":(90);
insert edge follow(degree) values "player129"->"player121":(90);
insert edge follow(degree) values "player129"->"player128":(90);
insert edge follow(degree) values "player130"->"player149":(80);
insert edge follow(degree) values "player131"->"player118":(95);
insert edge follow(degree) values "player133"->"player114":(90);
insert edge follow(degree) values "player133"->"player144":(90);
insert edge follow(degree) values "player134"->"player121":(-1);
insert edge follow(degree) values "player135"->"player102":(80);
insert edge follow(degree) values "player136"->"player147":(90);
insert edge follow(degree) values "player136"->"player137":(88);
insert edge follow(degree) values "player136"->"player117":(90);
insert edge follow(degree) values "player136"->"player148":(85);
insert edge follow(degree) values "player137"->"player136":(80);
insert edge follow(degree) values "player137"->"player148":(80);
insert edge follow(degree) values "player137"->"player129":(10);
insert edge follow(degree) values "player138"->"player115":(90);
insert edge follow(degree) values "player138"->"player139":(99);
insert edge follow(degree) values "player139"->"player138":(99);
insert edge follow(degree) values "player140"->"player114":(90);
insert edge follow(degree) values "player141"->"player124":(9);
insert edge follow(degree) values "player142"->"player117":(90);
insert edge follow(degree) values "player143"->"player150":(90);
insert edge follow(degree) values "player144"->"player145":(100);
insert edge follow(degree) values "player144"->"player100":(80);
insert edge follow(degree) values "player147"->"player136":(90);
insert edge follow(degree) values "player148"->"player127":(80);
insert edge follow(degree) values "player148"->"player136":(90);
insert edge follow(degree) values "player148"->"player137":(85);
insert edge follow(degree) values "player149"->"player130":(80);
insert edge follow(degree) values "player150"->"player137":(90);
insert edge follow(degree) values "player150"->"player143":(90);
insert edge follow(degree) values "player150"->"player120":(80);
insert edge serve(start_year,end_year) values "player100"->"team204":(1997, 2016);
insert edge serve(start_year,end_year) values "player101"->"team204":(1999, 2018);
insert edge serve(start_year,end_year) values "player101"->"team215":(2018, 2019);
insert edge serve(start_year,end_year) values "player102"->"team203":(2006, 2015);
insert edge serve(start_year,end_year) values "player102"->"team204":(2015, 2019);
insert edge serve(start_year,end_year) values "player103"->"team212":(2006, 2013);
insert edge serve(start_year,end_year) values "player103"->"team218":(2013, 2013);
insert edge serve(start_year,end_year) values "player103"->"team208":(2013, 2017);
insert edge serve(start_year,end_year) values "player103"->"team204":(2017, 2019);
insert edge serve(start_year,end_year) values "player104"->"team200":(2007, 2009);
insert edge serve(start_year,end_year) values "player104"->"team218":(2009, 2010);
insert edge serve(start_year,end_year) values "player104"->"team215"@20102012:(2010, 2012);
insert edge serve(start_year,end_year) values "player104"->"team221":(2012, 2013);
insert edge serve(start_year,end_year) values "player104"->"team204"@20132015:(2013, 2015);
insert edge serve(start_year,end_year) values "player104"->"team208":(2015, 2016);
insert edge serve(start_year,end_year) values "player104"->"team215"@20162017:(2016, 2017);
insert edge serve(start_year,end_year) values "player104"->"team222":(2017, 2018);
insert edge serve(start_year,end_year) values "player104"->"team219":(2018, 2018);
insert edge serve(start_year,end_year) values "player104"->"team204"@20182019:(2018, 2019);
insert edge serve(start_year,end_year) values "player105"->"team216":(2009, 2010);
insert edge serve(start_year,end_year) values "player105"->"team204":(2010, 2018);
insert edge serve(start_year,end_year) values "player105"->"team218":(2018, 2019);
insert edge serve(start_year,end_year) values "player106"->"team204":(2014, 2018);
insert edge serve(start_year,end_year) values "player106"->"team212":(2018, 2019);
insert edge serve(start_year,end_year) values "player107"->"team204":(2013, 2015);
insert edge serve(start_year,end_year) values "player107"->"team224":(2015, 2017);
insert edge serve(start_year,end_year) values "player107"->"team217":(2017, 2019);
insert edge serve(start_year,end_year) values "player108"->"team222":(2003, 2005);
insert edge serve(start_year,end_year) values "player108"->"team214":(2005, 2008);
insert edge serve(start_year,end_year) values "player108"->"team215":(2008, 2012);
insert edge serve(start_year,end_year) values "player108"->"team204":(2012, 2016);
insert edge serve(start_year,end_year) values "player108"->"team206":(2016, 2017);
insert edge serve(start_year,end_year) values "player109"->"team204":(2010, 2015);
insert edge serve(start_year,end_year) values "player109"->"team222":(2015, 2017);
insert edge serve(start_year,end_year) values "player109"->"team219":(2017, 2017);
insert edge serve(start_year,end_year) values "player110"->"team204":(2011, 2015);
insert edge serve(start_year,end_year) values "player110"->"team218":(2015, 2017);
insert edge serve(start_year,end_year) values "player110"->"team220":(2017, 2019);
insert edge serve(start_year,end_year) values "player111"->"team215":(2003, 2011);
insert edge serve(start_year,end_year) values "player111"->"team220":(2011, 2015);
insert edge serve(start_year,end_year) values "player111"->"team204":(2015, 2016);
insert edge serve(start_year,end_year) values "player111"->"team200":(2016, 2018);
insert edge serve(start_year,end_year) values "player112"->"team204":(2015, 2017);
insert edge serve(start_year,end_year) values "player112"->"team226":(2017, 2019);
insert edge serve(start_year,end_year) values "player112"->"team219":(2019, 2019);
insert edge serve(start_year,end_year) values "player113"->"team204":(2016, 2019);
insert edge serve(start_year,end_year) values "player114"->"team218":(1997, 2000);
insert edge serve(start_year,end_year) values "player114"->"team226":(2000, 2004);
insert edge serve(start_year,end_year) values "player114"->"team202":(2004, 2010);
insert edge serve(start_year,end_year) values "player114"->"team204":(2013, 2013);
insert edge serve(start_year,end_year) values "player115"->"team210":(1996, 2016);
insert edge serve(start_year,end_year) values "player116"->"team216"@20032010:(2003, 2010);
insert edge serve(start_year,end_year) values "player116"->"team229":(2010, 2014);
insert edge serve(start_year,end_year) values "player116"->"team216"@20142018:(2014, 2018);
insert edge serve(start_year,end_year) values "player116"->"team210":(2018, 2019);
insert edge serve(start_year,end_year) values "player117"->"team200":(2009, 2019);;
insert edge serve(start_year,end_year) values "player118"->"team205":(2008, 2019);
insert edge serve(start_year,end_year) values "player119"->"team205":(2007, 2016);
insert edge serve(start_year,end_year) values "player119"->"team200":(2016, 2019);
insert edge serve(start_year,end_year) values "player120"->"team205":(2009, 2012);
insert edge serve(start_year,end_year) values "player120"->"team202":(2012, 2019);
insert edge serve(start_year,end_year) values "player121"->"team215":(2005, 2011);
insert edge serve(start_year,end_year) values "player121"->"team207":(2011, 2017);
insert edge serve(start_year,end_year) values "player121"->"team202":(2017, 2021);
insert edge serve(start_year,end_year) values "player122"->"team207":(2008, 2018);
insert edge serve(start_year,end_year) values "player122"->"team213":(2018, 2019);
insert edge serve(start_year,end_year) values "player122"->"team223":(2019, 2019);
insert edge serve(start_year,end_year) values "player123"->"team209":(2011, 2017);
insert edge serve(start_year,end_year) values "player123"->"team206":(2017, 2019);
insert edge serve(start_year,end_year) values "player124"->"team217":(2006, 2014);
insert edge serve(start_year,end_year) values "player124"->"team213":(2014, 2015);
insert edge serve(start_year,end_year) values "player124"->"team208":(2015, 2016);
insert edge serve(start_year,end_year) values "player124"->"team221":(2016, 2017);
insert edge serve(start_year,end_year) values "player124"->"team211":(2017, 2018);
insert edge serve(start_year,end_year) values "player124"->"team210":(2018, 2019);
insert edge serve(start_year,end_year) values "player125"->"team204":(2002, 2018);
insert edge serve(start_year,end_year) values "player126"->"team216":(2011, 2017);
insert edge serve(start_year,end_year) values "player126"->"team217":(2017, 2019);
insert edge serve(start_year,end_year) values "player127"->"team218":(1998, 2004);
insert edge serve(start_year,end_year) values "player127"->"team227":(2004, 2009);
insert edge serve(start_year,end_year) values "player127"->"team226":(2009, 2010);
insert edge serve(start_year,end_year) values "player127"->"team214":(2010, 2011);
insert edge serve(start_year,end_year) values "player127"->"team213":(2011, 2014);
insert edge serve(start_year,end_year) values "player127"->"team212":(2014, 2017);
insert edge serve(start_year,end_year) values "player127"->"team208":(2017, 2018);
insert edge serve(start_year,end_year) values "player127"->"team222":(2018, 2019);
insert edge serve(start_year,end_year) values "player128"->"team201":(2003, 2011);
insert edge serve(start_year,end_year) values "player128"->"team223":(2011, 2017);
insert edge serve(start_year,end_year) values "player128"->"team205":(2017, 2018);
insert edge serve(start_year,end_year) values "player128"->"team202":(2018, 2019);
insert edge serve(start_year,end_year) values "player129"->"team229"@20032016:(2003, 2016);
insert edge serve(start_year,end_year) values "player129"->"team221":(2016, 2017);
insert edge serve(start_year,end_year) values "player129"->"team216":(2017, 2018);
insert edge serve(start_year,end_year) values "player129"->"team229"@20182019:(2018, 2019);
insert edge serve(start_year,end_year) values "player130"->"team219":(2014, 2019);
insert edge serve(start_year,end_year) values "player131"->"team220":(2010, 2017);
insert edge serve(start_year,end_year) values "player131"->"team205":(2017, 2019);
insert edge serve(start_year,end_year) values "player132"->"team225":(2013, 2019);
insert edge serve(start_year,end_year) values "player133"->"team202":(2002, 2011);
insert edge serve(start_year,end_year) values "player134"->"team207":(2009, 2018);
insert edge serve(start_year,end_year) values "player134"->"team224":(2018, 2019);
insert edge serve(start_year,end_year) values "player135"->"team203":(2012, 2019);
insert edge serve(start_year,end_year) values "player136"->"team214"@19961998:(1996, 1998);
insert edge serve(start_year,end_year) values "player136"->"team213":(1998, 2004);
insert edge serve(start_year,end_year) values "player136"->"team214"@20042012:(2004, 2012);
insert edge serve(start_year,end_year) values "player136"->"team210":(2012, 2015);
insert edge serve(start_year,end_year) values "player137"->"team213":(1998, 2019);
insert edge serve(start_year,end_year) values "player138"->"team212":(2001, 2008);
insert edge serve(start_year,end_year) values "player138"->"team210":(2008, 2014);
insert edge serve(start_year,end_year) values "player138"->"team221":(2014, 2016);
insert edge serve(start_year,end_year) values "player138"->"team204":(2016, 2019);
insert edge serve(start_year,end_year) values "player138"->"team225":(2019, 2020);
insert edge serve(start_year,end_year) values "player139"->"team212":(2008, 2019);
insert edge serve(start_year,end_year) values "player139"->"team218":(2019, 2019);
insert edge serve(start_year,end_year) values "player140"->"team224":(1994, 2000);
insert edge serve(start_year,end_year) values "player140"->"team226":(2000, 2007);
insert edge serve(start_year,end_year) values "player140"->"team214":(2007, 2012);
insert edge serve(start_year,end_year) values "player140"->"team207":(2012, 2013);
insert edge serve(start_year,end_year) values "player141"->"team225":(1996, 2003);
insert edge serve(start_year,end_year) values "player141"->"team205":(2003, 2007);
insert edge serve(start_year,end_year) values "player141"->"team217":(2007, 2012);
insert edge serve(start_year,end_year) values "player141"->"team229":(2012, 2014);
insert edge serve(start_year,end_year) values "player142"->"team200":(2011, 2019);
insert edge serve(start_year,end_year) values "player143"->"team223":(2015, 2019);
insert edge serve(start_year,end_year) values "player143"->"team213":(2019, 2020);
insert edge serve(start_year,end_year) values "player144"->"team226":(1992, 1996);
insert edge serve(start_year,end_year) values "player144"->"team210":(1996, 2004);
insert edge serve(start_year,end_year) values "player144"->"team229":(2004, 2008);
insert edge serve(start_year,end_year) values "player144"->"team214":(2008, 2009);
insert edge serve(start_year,end_year) values "player144"->"team216":(2009, 2010);
insert edge serve(start_year,end_year) values "player144"->"team217":(2010, 2011);
insert edge serve(start_year,end_year) values "player145"->"team228":(2008, 2012);
insert edge serve(start_year,end_year) values "player145"->"team201":(2012, 2015);
insert edge serve(start_year,end_year) values "player145"->"team213":(2015, 2016);
insert edge serve(start_year,end_year) values "player145"->"team200":(2016, 2018);
insert edge serve(start_year,end_year) values "player145"->"team210":(2018, 2019);
insert edge serve(start_year,end_year) values "player146"->"team226":(2004, 2012);
insert edge serve(start_year,end_year) values "player146"->"team210":(2012, 2013);
insert edge serve(start_year,end_year) values "player146"->"team202":(2013, 2016);
insert edge serve(start_year,end_year) values "player146"->"team222":(2016, 2017);
insert edge serve(start_year,end_year) values "player146"->"team215":(2017, 2018);
insert edge serve(start_year,end_year) values "player146"->"team228":(2018, 2019);
insert edge serve(start_year,end_year) values "player147"->"team214":(2002, 2010);
insert edge serve(start_year,end_year) values "player147"->"team223":(2010, 2015);
insert edge serve(start_year,end_year) values "player147"->"team229":(2015, 2016);
insert edge serve(start_year,end_year) values "player148"->"team213"@19941996:(1994, 1996);
insert edge serve(start_year,end_year) values "player148"->"team214":(1996, 2001);
insert edge serve(start_year,end_year) values "player148"->"team227":(2001, 2008);
insert edge serve(start_year,end_year) values "player148"->"team213"@20082012:(2008, 2012);
insert edge serve(start_year,end_year) values "player148"->"team223":(2012, 2013);
insert edge serve(start_year,end_year) values "player149"->"team219":(2016, 2019);
insert edge serve(start_year,end_year) values "player150"->"team213":(2018, 2019);
索引
create tag index player_index_0 on player();
create tag index player_index_1 on player(name(20));
2. 查询
2.1 查询player属性的顶点
# 前100条记录
MATCH (n:player) RETURN id(n), n.`player`.`name` as `name`, n.`player`.`age` as `age`
SKIP 0 LIMIT 100;
# 取任意节点前100条记录
MATCH (n)
RETURN id(n) AS id, properties(n) AS props
LIMIT 100;
2.2 查询所有顶点
# 查询所有顶点od
MATCH (v) RETURN id(v);
2.3 从起点到终点，中间的边是follow，返回起点和终点的id还有这个边的degree
MATCH (src)-[r:follow]->(dst)
RETURN id(src), rank(r), id(dst), r.`degree` AS `degree`
SKIP 0 LIMIT 100;
2.4 根据一个vertex的id查询其全部tag属性
FETCH PROP ON player "player100" YIELD properties(vertex)
2.5 根据条件查属性
lookup on player where player.age < 36 YIELD properties(vertex)
2.6 一跳查询
# 从顶点 player100 开始，沿 follow 边遍历 1 步，返回目标顶点 ID。
GO 1 STEP FROM "player100" OVER follow YIELD dst(edge) AS friend_id;
# 从顶点 player100 开始，沿 follow 边遍历 1 步，返回目标顶点的全部属性
-- Query 1
GO FROM "player100" OVER follow
YIELD dst(edge) AS friend_id |
FETCH PROP ON * $-.friend_id YIELD vertex as friend, properties(vertex) AS props
介绍一下 FETCH PROP ON * $-.friend_id
在 Nebula Graph 的 nGQL 语句中，FETCH PROP ON语句用于获取指定顶点或边的属性。当与 * 结合使用时，它表示获取所有标签的所有属性。 当这条语句跟随一个管道操作符（|）并配合 $- 符号使用时，它可以用于获取上一个查询语句输出的结果中的某个列值作为当前查询的输入。
3. 边的关系
3.1 follow边的关系
# 返回所有边的信息。这条查询的基本目的是找到图中所有存在的边，不论它们的方向如何
MATCH ()<-[e]->() RETURN e
- MATCH：这是 Nebula Graph 使用的 Cypher-like 查询语法的一部分，用于模式匹配。
- (): 表示任意顶点。
<-[e]->(): 表示一个边模式，其中 e 是边的别名，可以用来在返回语句中引用。<-[e]-> 表示边可以是双向的，即不考虑边的方向。- RETURN e: 返回找到的所有边的详细信息。
MATCH ()-[e:follow]->() RETURN e
- MATCH: 这是一个图查询操作，用于寻找满足特定模式的数据。
- ()-[e:follow]->(): 这个模式表示寻找从任意顶点到任意顶点的 follow 类型的有向边。 方括号中的 e 是对匹配到的边的引用，follow 指明了边的类型。
- RETURN e: 这表示返回查询匹配到的边的详细信息。
4. GO语句的查询
go语句查询手册 https://docs.nebula-graph.com.cn/3.8.0/3.ngql-guide/7.general-query-statements/3.go/
GO语句是 NebulaGraph 图数据库中用于从给定起始点开始遍历图的语句。GO语句采用的路径类型是walk，即遍历时点和边都可以重复。
3.1 查询起始点的直接邻居点
场景：查询某个点的直接相邻点，例如查询一个人所属队伍。
# 返回 player102 所属队伍。
GO FROM "player102" OVER serve YIELD dst(edge);
3.2 查询指定跳数内的点
场景：查询一个点在指定跳数内的所有点，例如查询一个人两跳内的朋友。
# 返回距离 player102 两跳的朋友。 1条内的数据是没有的
GO 2 STEPS FROM "player102" OVER follow YIELD dst(edge);
# 1到2条的全部结果
GO 1 TO 2 STEPS FROM "player102" OVER follow YIELD dst(edge);
# 1到2条的全部结果 返回结果去重
GO 1 TO 2 STEPS FROM "player102" OVER follow
YIELD DISTINCT dst(edge) AS destination;
# 在上面基础上返回的结果加上顶点的全部属性
GO 1 TO 2 STEPS FROM "player102" OVER follow
YIELD DISTINCT dst(edge) AS destination |
FETCH PROP ON * $-.destination YIELD properties(vertex)
查询边
# 以player102为起点然后通过边follow,两跳，然后的边的结果 会有重复边的结果
GO 2 steps FROM "player102" OVER follow BIDIRECT YIELD edge AS e;
# 对边去重
GO 2 steps FROM "player102" OVER follow BIDIRECT YIELD DISTINCT edge as destination;
去重后的结果
查询边另一个例子
GO FROM "player102" OVER follow BIDIRECT YIELD DISTINCT edge as destination;
5. 复杂查询
5.1 查询从player102按照serve边的1跳结果
GO FROM "player102" OVER serve YIELD dst(edge),type(edge) as link, properties($$) as properties,
tostring(src(edge)) as src,
tostring(dst(edge)) as dst,
tags($$) as tagLists;
5.2 验证
GO FROM "player102" OVER serve YIELD edge as destination;
6. Schema 相关函数
Schema 相关函数 https://docs.nebula-graph.com.cn/3.8.0/3.ngql-guide/6.functions-and-expressions/4.schema/
6.1 id(vertex)
id(vertex) 返回点 ID。
语法：id(vertex)
返回类型：和点 ID 的类型保持一致。
nebula> LOOKUP ON player WHERE player.age > 45 YIELD id(vertex);
+-------------+
| id(VERTEX) |
+-------------+
| "player144" |
| "player140" |
+-------------+
6.2 properties(vertex)
properties(vertex) 返回点的所有属性。
语法：properties(vertex)
返回类型：map。
nebula> LOOKUP ON player WHERE player.age > 45 \
YIELD properties(vertex);
+-------------------------------------+
| properties(VERTEX) |
+-------------------------------------+
| {age: 47, name: "Shaquille O'Neal"} |
| {age: 46, name: "Grant Hill"} |
+-------------------------------------+
用户也可以使用属性引用符（$^和$$）替代函数properties()中的vertex参数来获取点的所有属性。
$^表示探索开始时的点数据。例如GO FROM "player100" OVER follow reversely YIELD properties($^)中，$^指player100这个点。
$$表示探索结束的终点数据。
6.3 properties(edge)
properties(edge) 返回边的所有属性。
语法：properties(edge)
返回类型：map。
示例：
nebula> GO FROM "player100" OVER follow \
YIELD properties(edge);
+------------------+
| properties(EDGE) |
+------------------+
| {degree: 95} |
| {degree: 95} |
+------------------+
6.4 type(edge)
type(edge)返回边的 Edge type。
语法：type(edge)
返回类型：string。
示例：
nebula> GO FROM "player100" OVER follow \
YIELD src(edge), dst(edge), type(edge), rank(edge);
+-------------+-------------+------------+------------+
| src(EDGE) | dst(EDGE) | type(EDGE) | rank(EDGE) |
+-------------+-------------+------------+------------+
| "player100" | "player101" | "follow" | 0 |
| "player100" | "player125" | "follow" | 0 |
+-------------+-------------+------------+------------+
6.5 src(edge)
src(edge) 返回边的起始点 ID。
语法：src(edge)
返回类型：和点 ID 的类型保持一致。
示例：
nebula> GO FROM "player100" OVER follow \
YIELD src(edge), dst(edge);
+-------------+-------------+
| src(EDGE) | dst(EDGE) |
+-------------+-------------+
| "player100" | "player101" |
| "player100" | "player125" |
+-------------+-------------+
6.6 dst(edge)
dst(edge) 返回边的目的点 ID。
语法：dst(edge)
返回类型：和点 ID 的类型保持一致。
示例：
nebula> GO FROM "player100" OVER follow \
YIELD src(edge), dst(edge);
+-------------+-------------+
| src(EDGE) | dst(EDGE) |
+-------------+-------------+
| "player100" | "player101" |
| "player100" | "player125" |
+-------------+-------------+
6.7 rank(edge)
rank(edge) 返回边的 rank。
语法：rank(edge)
返回类型：int。
示例：
nebula> GO FROM "player100" OVER follow \
YIELD src(edge), dst(edge), rank(edge);
+-------------+-------------+------------+
| src(EDGE) | dst(EDGE) | rank(EDGE) |
+-------------+-------------+------------+
| "player100" | "player101" | 0 |
| "player100" | "player125" | 0 |
+-------------+-------------+------------+
6.8 vertex
vertex 返回点的信息。包括点 ID、Tag、属性和值。需要用AS 设置别名。
语法：vertex
示例：
nebula> LOOKUP ON player WHERE player.age > 45 YIELD vertex AS v;
+----------------------------------------------------------+
| v |
+----------------------------------------------------------+
| ("player144" :player{age: 47, name: "Shaquille O'Neal"}) |
| ("player140" :player{age: 46, name: "Grant Hill"}) |
+----------------------------------------------------------+
6.9 edge
edge 返回边的信息。包括 Edge type、起始点 ID、目的点 ID、rank、属性和值。需要用AS 设置别名。
语法：edge
示例：
nebula> GO FROM "player100" OVER follow YIELD edge AS e;
+----------------------------------------------------+
| e |
+----------------------------------------------------+
| [:follow "player100"->"player101" @0 {degree: 95}] |
| [:follow "player100"->"player125" @0 {degree: 95}] |
+----------------------------------------------------+
6.10
id()
id() 返回点 ID。
语法：id(<vertex>)
返回类型：和点 ID 的类型保持一致。
示例：
nebula> MATCH (v:player) RETURN id(v);
+-------------+
| id(v) |
+-------------+
| "player129" |
| "player115" |
| "player106" |
| "player102" |
...
6.11 tags() 和labels()
tags() 和labels() 返回点的 Tag。
语法：tags(<vertex>)、labels(<vertex>)
返回类型：list。
示例：
nebula> MATCH (v) WHERE id(v) == "player100" \
RETURN tags(v);
+------------+
| tags(v) |
+------------+
| ["player"] |
+------------+
6.12 properties()
properties() 返回点或边的所有属性。
语法：properties(<vertex_or_edge>)
返回类型：map。
示例：
nebula> MATCH (v:player)-[e:follow]-() RETURN properties(v),properties(e);
+---------------------------------------+---------------+
| properties(v) | properties(e) |
+---------------------------------------+---------------+
| {age: 31, name: "Stephen Curry"} | {degree: 90} |
| {age: 47, name: "Shaquille O'Neal"} | {degree: 100} |
| {age: 34, name: "LeBron James"} | {degree: 13} |
...