MySQL在5.1引入了一个rename database操作，但在MySQL5.1.23后又不支持这个命令。可以说是一个实验性的功能，没有在生产中支持过（mysql-5.1 release在mysql-5.1.30）,那么生产中我们有时为了追求完美需要改一下库名。怎么操作呢？
这里提供一个变通的方法。
1. 创建出新库名：
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mysql>create database db_v2;
mysql>create database db_v2;
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2.生成rename语句，从olddb里迁移,我这里olddb里sbtest;
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mysql>select concat("rename table ",table_schema,".",table_name," to db_v2.",table_name,";") into outfile '/tmp/rename_to_db_v2.sql' from information_schema.tables where table_schema='sbtest';
mysql>select concat("rename table ",table_schema,".",table_name," to db_v2.",table_name,";") into outfile '/tmp/rename_to_db_v2.sql' from information_schema.tables where table_schema='sbtest';
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3.执行生成的sql
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mysql>source /tmp/rename_to_db_v2.sql
mysql>source /tmp/rename_to_db_v2.sql
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就这么简单可以搞定了。
Good luck!