Mysql常用语句汇总

Mysql常用查询语句汇总
https://blog.youkuaiyun.com/weixin_41189380/article/details/83375281
如何在MySQL数据库添加和修改字段以及操作数据库
https://blog.youkuaiyun.com/qq_37138818/article/details/82145358
sprintf_s(sql_insert, 1000, “select * from customer where producenumber=(’%s’)”, producenumber);