运维笔记--postgresql查看表结构、表名、字段类型、字段注释
连接数据库服务器,切换至postgres(或其他数据库用户)下,
psql--进入数据库命令行终端,执行如下相关查询操作:
显示数据库:
\l
连接指定的数据库:
\c 数据库名
查看当前实例下的表:
\dt
用sql语句方式查询:
SELECT tablename FROM pg_tables;
查询某张表的表结构及字段信息
\d tablename--实际表名
用sql语句方式查询:
SELECT a.attnum, a.attname AS field, t.typname AS type, a.attlen AS length, a.atttypmod AS lengthvar , a.attnotnull AS notnull, b.description AS comment FROM pg_class c, pg_attribute a LEFT JOIN pg_description b ON a.attrelid = b.objoid AND a.attnum = b.objsubid, pg_type t WHERE c.relname = '实际的表名' AND a.attnum > 0 AND a.attrelid = c.oid AND a.atttypid = t.oid ORDER BY a.attnum;