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基于postgresql查詢某個字段屬于哪個表的說明

 更新時間：2021年01月18日 08:37:20   作者：一碗面  
這篇文章主要介紹了基于postgresql查詢某個字段屬于哪個表的說明，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧

一、場景還原

前端小林問我，它從前端的返回的某些字段，想知道那個表有這個字段，它想操作這個表……

二、sql語句

SELECT *
FROM information_schema. COLUMNS
WHERE COLUMN_NAME = 'storename';

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';

補(bǔ)充：postgresql數(shù)據(jù)庫查詢所有字段詳細(xì)信息，包括描述

把里邊的public改成相應(yīng)模式名（默認(rèn)為public，可不改）

table_name改成對應(yīng)表名稱

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;

以上為個人經(jīng)驗(yàn)，希望能給大家一個參考，也希望大家多多支持腳本之家。如有錯誤或未考慮完全的地方，望不吝賜教。

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