MySQL：按前缀批量删除表格

想要实现mysql>drop table like "prefix_%"

没有直接可用的命令，不过可以通过mysql语法来组装，

SELECT CONCAT( 'DROP TABLE ', GROUP_CONCAT(table_name) , ';' ) 
AS statement FROM information_schema.tables 
WHERE table_schema = 'database_name' AND table_name LIKE 'myprefix_%';

然后执行该组装后的命令，比如从slowquery表中删除掉所有tmp_开头的表：

SELECT CONCAT( 'DROP TABLE ', GROUP_CONCAT(table_name) , ';' ) AS statement FROM information_schema.tables WHERE table_schema = 'slowquery' AND table_name LIKE 'tmp_%';

输出结果：

drop table tmp_201301,tmp_201302,tmp_201351,tmp_201352; 

执行之即可。

 

我自己现实中的例子：

/*
自动生成删除动态表SQL语句
用法：拷贝到查询分析器中执行，把结果拷贝出来再执行就OK了。
*/
SELECT REPLACE(GROUP_CONCAT(a.dropSql),',','') AS dropSql
FROM
(
SELECT CONCAT( 'drop table ', table_name, ';' ) AS dropSql
FROM information_schema.tables 
WHERE table_name LIKE 'slavetablemgr%'

UNION

SELECT CONCAT( 'drop table ', table_name, ';' ) AS dropSql
FROM information_schema.tables 
WHERE table_name LIKE 'DevicePlugin_%'

UNION

SELECT CONCAT( 'drop table ', table_name, ';' )  AS dropSql
FROM information_schema.tables 
WHERE table_name LIKE 'historyrecordhour%'

UNION

SELECT CONCAT( 'drop table ', table_name, ';' )  AS dropSql
FROM information_schema.tables 
WHERE table_name LIKE 'historyrecordminute%'

UNION

SELECT CONCAT( 'drop table ', table_name, ';' )  AS dropSql
FROM information_schema.tables 
WHERE table_name LIKE 'historyrecordsecond%'
) a;