目录1.什么是null2.执行对比2.1 查询条件为 =null2.2 查询条件为 is null2.3 两次查询的为何不同2.4 使用 =null的解决方式总结1.什么是null
开发者_Go百科I noticed some people don\'t bother having the usual incremented number as ID but instead simply generate a GUID. The advantages include:
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