目录mysql alter添加列alter的执行过程如下mysql基础之alter字段解读1、先创建一张表testalter_tbl2、删除，添加或修改表字段3、修改字段类型及名称4、 ALTER TABLE 对 Null 值和默认值的影响总结mysql alte编程r添加
My company has a handful of apps that we deploy in the websites we build.Recently a very old app needed to be included along side a newer app and there was a conflict w/ a duplicate table name needed
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