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我只知道范围查询between and > < 可以用到一次索引,第二次就用不上了,而多值精确查找in就没这个限制,为什么呢?在索引原理上如何解释?
人生最曼妙的风景,竟是内心的淡定与从容!
I don’t know what situation you are talking about. Indexes can be used in both cases. What do you mean by the second time?
I don’t know what situation you are talking about. Indexes can be used in both cases. What do you mean by the second time?