nebulagraph图数据库中的LOOKUP查询汇总

LOOKUP ON {<vertex_tag> | <edge_type>} 
[WHERE <expression> [AND <expression> ...]] 
YIELD <return_list> [AS <alias>]

模式	示例	说明
检索点	LOOKUP ON player WHERE player.name == "Tony Parker" YIELD player.name AS name, player.age AS age	返回 Tag 为player且name为Tony Parker的点。
检索边	LOOKUP ON follow WHERE follow.degree == 90 YIELD follow.degree	返回 Edge type 为follow且degree为90的边。
通过 Tag 列出所有点	LOOKUP ON player YIELD properties(vertex),id(vertex)	查找所有 Tag 为player的点 VID。
通过 Edge type 列出边	LOOKUP ON follow YIELD edge AS e	查找 Edge type 为follow的所有边的信息。
统计点	LOOKUP ON player YIELD id(vertex)| YIELD COUNT(*) AS Player_Count	统计 Tag 为player的点。
统计边	LOOKUP ON follow YIELD edge as e | YIELD COUNT(*) AS Like_Count	统计 Edge type 为follow的边。