1. 獲取表中普通信息：如字段名，字段類型等
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SELECT column_name, data_type, ordinal_position, is_nullable FROM information_schema."columns"WHERE "table_name"='TABLE-NAME' -- 將 'TABLE-NAME' 換成自己的表 |
2.獲取所有的表和視圖
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SELECT table_name, table_type FROM INFORMATION_SCHEMA.tables WHERE table_schema='public' AND table_type IN ('BASE TABLE','VIEW') |
3.獲取約束注釋
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SELECT obj_description(oid, 'pg_constraint') AS d FROM pg_constraint WHERE conname = constraint_name; |
4.獲取表的約束
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-- conname 約束名稱-- contype 約束類型(p:主鍵, f:外鍵, c: 檢查約束, u:唯一約束)-- conkey 約束字段-- confkey 外鍵字段-- consrc 檢查約束條件-- confreltable 外鍵字段引用的表SELECT conname, contype, conkey, consrc, (SELECT array_agg(column_name::text) FROM INFORMATION_SCHEMA.COLUMNS WHERE ordinal_position = any(conkey) AND table_name= 'TABLE-NAME') AS conkey, (SELECT column_name FROM INFORMATION_SCHEMA.COLUMNS WHERE ordinal_position = any(confkey) AND table_name='TABLE-NAME') AS confkey, (SELECT relname FROM pg_class WHERE oid = confrelid) AS confreltableFROM pg_constraint WHERE conrelid=(SELECT oid FROM pg_class WHERE relname ='TABLE-NAME'); -- 將 'TABLE-NAME' 換成自己的表 |
5.獲取表的觸發器
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SELECT trigger_name, event_manipulation, event_object_table, action_statement, action_orientation, action_timing FROM INFORMATION_SCHEMA.TRIGGERS; |
6.獲取字段的注釋
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--table_oid 表的oid--col_position 字段的位置SELECT col_description(table_oid, col_position); |
補充：查詢PostgreSQL庫中所有表的表結構信息SQL
我就廢話不多說了，大家還是直接看代碼吧~
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select(select relname as comment from pg_class where oid=a.attrelid) as table_name, row_number() over(partition by (select relname as comment from pg_class where oid=a.attrelid) order by a.attnum),a.attname as column_name,format_type(a.atttypid,a.atttypmod) as data_type,(case when atttypmod-4>0 then atttypmod-4 else 0 end)data_length,(case when (select count(*) from pg_constraint where conrelid = a.attrelid and conkey[1]=attnum and contype='p')>0 then '是' else '否' end) as 主鍵約束,(case when (select count(*) from pg_constraint where conrelid = a.attrelid and conkey[1]=attnum and contype='u')>0 then '是' else '否' end) as 唯一約束,(case when (select count(*) from pg_constraint where conrelid = a.attrelid and conkey[1]=attnum and contype='f')>0 then '是' else '否' end) as 外鍵約束,(case when a.attnotnull=true then '是' else '否' end) as nullable,col_description(a.attrelid,a.attnum) as commentfrom pg_attribute awhere attstattarget=-1 and attrelid in (select oid from pg_class where relname in(select relname from pg_class where relkind ='r' and relname in(select tablename from pg_tables where tablename not like 'pg_%' and tablename not like 'sql_%' and schemaname not in(XXXX) and tablename not in(XXXX)))order by table_name,a.attnum; |
以上為個人經驗，希望能給大家一個參考，也希望大家多多支持服務器之家。如有錯誤或未考慮完全的地方，望不吝賜教。
原文鏈接：https://blog.csdn.net/rantengfei1986/article/details/56670712
