在PostgreSQL中,要查询所有表的名字、字段名和对应的表名注释,可以分别查询系统目录表 pg_class、pg_attribute 和pg_description。以下是具体的步骤和对应的SQL查询语句: 查询所有表名: 使用pg_class 表可以查询数据库中所有的表名。 sql SELECT relname AS table_name FROM pg_class WHERE relkind = 'r' AND...
(select relname||'---'||(select description from pg_description where objoid=oid and objsubid=0) as comment from pg_class where oid=a.attrelid) as table_name, "a".attname as column_name, format_type("a".atttypid,"a".atttypmod) as data_type, col_description("a".attrelid,"a"...
FROM pg_class a LEFT OUTERJOIN pg_description bON b.objsubid=0AND a.oid = b.objoid WHERE a.relnamespace = (SELECT oidFROM pg_namespaceWHERE nspname='public')--用户表一般存储在public模式下 AND a.relkind='r' ORDERBY a.relname 使用表名查询表字段的定义 SELECT a.attnum, a.attnameAS...
1. 2. 3. 查看所有表名 select tablename from pg_tables where schemaname='public' and position('_2' in tablename)=0; select * from pg_tables; 1. 2. 查看表名和备注 select relname as tabname,cast(obj_description(relfilenode,'pg_class') as varchar) as comment from pg_class c ...
首先用高级权限账号查出所有的表名字 然后navicat新建用户 新增权限,授予权限,然后发现每个表单独授权,太麻烦 于是用下面的SQL获取所有表 select distinct col.table_name as 表名 from information_schema.columns col left join pg_description des on col.table_name::regclass = des.objoid ...
(select description from pg_description where objoid = a.attrelid and objsubid = a.attnum) as 备注 from pg_class c, pg_attribute a , pg_type t, information_schema.columns as col where c.relname = 'live_camerainfo' and a.attnum>0 ...
pg_description information_schema tables STATISTICS 示例1 pg_catalog 包含系统的自带函数/数据类型定义等,是postgres正常运转的基础。 pg_namespace 用来存放各个模式的信息。 nspname:模式名 oid:模式id,是隐藏列,看不见,但可以用,用来关联其他表。 nspowner:所有者 nspacl:权限 pg_class 用来存放各个表的信息...
pgsql查表结构和函数内容 pgsql查表结构和函数内容⽅式⼀:1SELECT a.attnum,2 a.attname AS field,3 t.typname AS type,4 a.attlen AS length,5 a.atttypmod AS lengthvar,6 a.attnotnull AS notnull,7 b.description AS comment 8FROM pg_class c,9 pg_attribute ...
行数据报文其实两者差距不大,都是返回一行数据,可能在格式上有所差异,但是整体信息上相差无几,相差较大的是行信息描述的报文,在MySQL中称为ColumnDefinition,在PostgreSQL中称为RowDescription。这个报文的主要内容就是列字段信息,一个表一般都有多行,所以这个报文是一个列信息的集合,那么我们主要关注则是一个列...
mydb=# ALTER TYPE mood ADD VALUE IF NOT EXISTS 'happier' AFTER 'happy'; mydb=# \dT+ mood; List of data types Schema | Name | Internal name | Size | Elements | Owner | Access privileges | Description ---+---+---+---+---+---+---+--- public | mood | mood | 4 | sad...