基于postgresql查询某个字段属于哪个表的说明_PostgreSQL

基于postgresql查询某个字段属于哪个表的说明

2021-03-27 21:11一碗面 PostgreSQL

这篇文章主要介绍了基于postgresql查询某个字段属于哪个表的说明，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧

一、场景还原

前端小林问我，它从前端的返回的某些字段，想知道那个表有这个字段，它想操作这个表……

二、sql语句

									SELECT *

									FROM information_schema. COLUMNS

									WHERE COLUMN_NAME = 'storename';

基于postgresql查询某个字段属于哪个表的说明

									SELECT c.relname AS "表名",a.attname AS "字段名",c.oid

									FROM pg_class c 

									LEFT JOIN pg_attribute a ON a.attrelid = c.oid

									WHERE c.relname NOT LIKE 'pg_%'

									-- AND c.relname = 'kx_store'

									AND a.attname = 'storename';

基于postgresql查询某个字段属于哪个表的说明

补充：postgresql数据库查询所有字段详细信息，包括描述

把里边的public改成相应模式名（默认为public，可不改）

table_name改成对应表名称

									SELECT AA.*,BB.DESC FROM

									 (

									SELECT

									A.ORDINAL_POSITION AS COL_NUM,

									A.COLUMN_NAME AS COL_NAME,

									A.DATA_TYPE AS COL_TYPE,

									A.CHARACTER_MAXIMUM_LENGTH AS COL_LEN,

									A.NUMERIC_PRECISION AS COL_PREC,

									A.DATETIME_PRECISION AS COL_TIME_PREC,

									A.IS_NULLABLE AS COL_NULLABLE,

									A.COLUMN_DEFAULT AS COL_DEFAULT

									FROM INFORMATION_SCHEMA.COLUMNS A

									WHERE A.TABLE_SCHEMA = 'public' AND A.TABLE_NAME = 'table_name'

									 )

									 AS AA LEFT JOIN

									 (

									SELECT

									OBJSUBID,

									DESCRIPTION AS DESC

									FROM PG_DESCRIPTION

									WHERE OBJOID =

									(

									 SELECT RELID FROM PG_STAT_ALL_TABLES WHERE SCHEMANAME = 'public' AND RELNAME = 'table_name'

									)

									 )

									 AS BB ON AA.COL_NUM = BB.OBJSUBID ORDER BY AA.COL_NUM;