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开发时，怎么选取mysql字段长度

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Jun 13, 2016 am 11:22 AM

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开发时，如何选取mysql字段长度
如我要存个值为：0123456789,选int型的那么他的"长度/值"该写多少呢？如何计算的我发现这个长度/值写1，居然也能存进去，或者我要存字符串"你的名字"这4个字，选varchar型的，长度/值又该写多少呢

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