生活の笔记
MySQL基本操作命令汇总–笔记
| 2015-05-26
单表查询 高级查询 外键 外键是指引用另一个表中的一列或者多列，被引用的列应该具有主键约束或者唯一性约束，用于建立和加强两个数据表之间的连接。 一对多
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Tag: MySQL
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