MySQL LIKE与LOCATE | LIKE与LOCA

本文介绍了MySQL LIKE与LOCATE的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

有人知道哪个更快吗?

SELECT * FROM table WHERE column LIKE '%text%';

或

SELECT * FROM table WHERE LOCATE('text',column)>0;

推荐答案

添加于2015年4月20日:请另阅读 Hallie的答案下方

Added April 20th, 2015: Please read also Hallie's answer below

第一个，但很少.主要是因为它不必进行额外的> 0比较.

First one but marginally. Mostly because it doesn't have to do an extra > 0 comparison.

mysql> SELECT BENCHMARK(100000000,LOCATE('foo','foobar'));
+---------------------------------------------+
| BENCHMARK(100000000,LOCATE('foo','foobar')) |
+---------------------------------------------+
|                                           0 |
+---------------------------------------------+
1 row in set (3.24 sec)

mysql> SELECT BENCHMARK(100000000,LOCATE('foo','foobar') > 0);
+-------------------------------------------------+
| BENCHMARK(100000000,LOCATE('foo','foobar') > 0) |
+-------------------------------------------------+
|                                               0 |
+-------------------------------------------------+
1 row in set (4.63 sec)


mysql> SELECT BENCHMARK(100000000,'foobar' LIKE '%foo%');
+--------------------------------------------+
| BENCHMARK(100000000,'foobar' LIKE '%foo%') |
+--------------------------------------------+
|                                          0 |
+--------------------------------------------+
1 row in set (4.28 sec)


mysql> SELECT @@version;
+----------------------+
| @@version            |
+----------------------+
| 5.1.36-community-log |
+----------------------+
1 row in set (0.01 sec)

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