--查询tablename 数据库中 以"_copy" 结尾的表select table_name from information_schema.tables where table_schema='tablename' and table_type='base table' and table_name like '%_copy';--information_schema 是MySQL系统自带的数据库,提供了对数据库元数据的访问--information_schema.tables 指数据库中的表(information_schema.columns 指列)--table_schema 指数据库的名称--table_type 指是表的类型(base table 指基本表,不包含系统表)--table_name 指具体的表名--如果本身是在tablename 这个库里新建的查询,可以去掉 table_schema='tablename ' 这一句select table_name from information_schema.tables where table_type='base table' and table_name like '%_copy';--在Informix数据库中,如何查询表名中包含某字段的表select * from systables where tabname like 'saa%'--此法只对Informix数据库有用 --查询指定数据库中指定表的所有字段名column_nameselect column_name from information_schema.columns where table_schema='csdb' and table_name='xxx' SELECT * FROM information_schema.columns WHERE column_name='brand_id'; --检查数据库'test'中的某一个表'd_ad'是否存在select count(1) from information_schema.tables where table_schema = 'test' and table_name = 'd_ad'; --如何查询mysql数据库中有多少张表select count(*) TABLES, table_schema from information_schema.tables where table_schema = 'test' group by table_schema;
-- 查询MySql数据库架构信息:数据库,表,表字段/*1.查询所有数据库*/show databases; /*2.查询所有数据表*/select * from information_schema.tables where table_schema='world'/*3.查询指定表的所有字段*/select * from information_schema.columns where table_schema='world'and table_name='city'
源文:https://www.cnblogs.com/acm-bingzi/p/mysql-information-schema.html