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PostgreSQL三种自增列sequence,serial,identity的用法区别
这三个对象都可以实现自增,这里从如下几个维度来看看这几个对象有哪些不同,其中功能性上看,大部分特性都是一致的或者类似的。 1、sequence在所有数据库中的性质都一样,它是跟具体的字段不是强绑定的,其特点是支持多个对个对象之间共享。 sequence作为 ...
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