1、查看當(dāng)前數(shù)據(jù)庫(kù)版本

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mydb=#?select?version();
?????????????????????????????????????????????????version?????????????????????????????????????????????????
---------------------------------------------------------------------------------------------------------
?PostgreSQL?12.0?on?x86_64-pc-linux-gnu,?compiled?by?gcc?(GCC)?4.8.5?20150623?(Red?Hat?4.8.5-39),?64-bit

2、with子句，查看role和組的關(guān)系

with temp as?

(select? a.rolname,a.rolsuper,m.member from? pg_authid a join pg_auth_members m?

on a.oid=m.roleid)

select temp.rolname,temp.rolsuper,s.rolname as groupname from temp join pg_authid s?

on temp.member = s.oid;

mydb=#?with?temp?as?
mydb-#?(select??a.rolname,a.rolsuper,m.member?from??pg_authid?a?join?pg_auth_members?m?
mydb(#?on?a.oid=m.roleid)
mydb-#?select?temp.rolname,temp.rolsuper,s.rolname?as?groupname?from?temp?join?pg_authid?s?
mydb-#?on?temp.member?=?s.oid;
???????rolname????????|?rolsuper?|?groupname??
----------------------+----------+------------
?pg_read_all_settings?|?f????????|?pg_monitor
?pg_read_all_stats????|?f????????|?pg_monitor
?pg_stat_scan_tables??|?f????????|?pg_monitor

文章名稱(chēng)：postgresqlwith子句
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