PostgreSQL 实现查询表字段信息SQL脚本

时间:2021-01-07 Allen Leung 人气:0

这篇文章主要介绍了PostgreSQL 实现查询表字段信息SQL脚本，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

查询格式：

SELECT
  c.relname 表名称,
 A.attname AS 字段名称,
 col_description(A.attrelid,A.attnum) AS 注释,
 format_type ( A.atttypid, A.atttypmod ) AS 类型,
 CASE WHEN A.attnotnull='f' THEN '否' ELSE '是' END AS 是否必填,
 a.attnum 序号
FROM
 pg_class AS c,
 pg_attribute AS a
WHERE
 A.attrelid = C.oid 
 AND A.attnum > 0
 ORDER BY c.relname,a.attnum;

查询示例：

SELECT
 c.relname 表名称,
 A.attname AS 字段名称,
 split_part(col_description ( A.attrelid, A.attnum ),'：',1) AS 注释,
 format_type ( A.atttypid, A.atttypmod ) AS 类型,
 CASE WHEN A.attnotnull='f' THEN '否' ELSE '是' END AS 是否必填,
 a.attnum 序号
FROM
 pg_class AS c,
 pg_attribute AS a
WHERE
 c.relnamespace=16389
 AND c.relname not like 'v_%'
 AND c.relname not like 'pk_%'
 AND c.relname not like 'unidx%'
 AND c.relname not like '%_index'
 AND c.relname not like '%_seq'
 AND c.relname not like '%_pkey'
 AND A.attrelid = C.oid 
 AND A.attnum > 0
 ORDER BY c.relname,a.attnum;

查询效果：

补充：postgresql 查询某一个表中的所有字段

postgresql 查询某一个表中的所有字段，也就是查询所有的列名

select * from information_schema.columns
where table_schema='public' and table_name='表名称 ';

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。

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