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数据库中的表还是一定要建索引

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Release： 2016-06-07 17:44:48
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数据库中的表还是一定要建索引 上次说到在表中，加了触发器以后，会产生死锁的问题。后来又仔细再研究了一下，发现是没有对where条件面用到的字段建索引引起的，甚至连主键都没有定义。 专门测试了一下没有建索引，每分钟处理3百条，对where条件里用到的字段

数据库中的表还是一定要建索引

上次说到在表中，加了触发器以后，会产生死锁的问题。后来又仔细再研究了一下，发现是没有对where条件面用到的字段建索引引起的，甚至连主键都没有定义。

专门测试了一下没有建索引，美国服务器，每分钟处理3百条，对where条件里用到的字段建索引以后，每分钟3千条，香港服务器租用，提高了十倍。

这真是一个低级错误。 

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，美国服务器
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