Mysql 可以为整数类型制定宽度,例如:int(11) ,对大多数应用这是没有意义的:它不会限制值的合法范围,它只是规定了Mysql的一些交互工具(例如mysql命令行客户端)用来显示字符个数。对于存储和计算来说:int(11)和int(1)是相同的。
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