MySQL元数据信息

一.查看数据库清单

      show databases;

二.查看数据库下表清单

方法1)
      show full tables from ${schema名};
方法2)
      use ${数据库名};
      show tables;

三.查看表详细信息

      select * from information_schema.tables where table_schema = ${Schema名} and table_name = ${表名};

四.查看表字段详细信息

方法1)
      show full columns from ${表名};
方法2)
      select * from information_schema.columns where table_schema = ${schema名} and table_name = ${表名};