关于sql语句判断与程序判断,哪个更省时省力?

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Release: 2016-06-23 14:00:39
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关于sql语句判断与程序判断,哪个更省时省力?
一,
1,select if(age>10,name,'10') as 姓名 from student;(mysql sql判断年龄大于10则查出姓名)
2,循环展示在前台
二,
1,select name from student;
2,程序判断年龄大于10并循环显示在前台
问:
关于第一和第二两种方法,哪个更省时省力?(可以不局限于上面的例子)


回复讨论(解决方案)

自己测试下看下两个方法的执行时间不久不知道了吗

sql快,前提是age字段做索引。
你想,要是你有一百万条记录,也读到数组里然后遍历么?

sql比程序快。

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