查询格式：
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SELECT
c.relname 表名称,
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;
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查询示例：
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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;
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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
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select * from information_schema.columns
where table_schema='public' and table_name='表名称 ';
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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服务器之家。如有错误或未考虑完全的地方，望不吝赐教。
原文链接：https://blog.csdn.net/londa/article/details/107810923