标签：user 语句 如何 from xpl 输入 磁盘 ble exec
一、索引中包含like关键字
explain select * from user where name like ‘ab%‘
explain select * from user where name like ‘zz%‘and age = 1;
explain select * from user where name like ‘%zz‘;
explain select * from user where name like ‘%zz‘and age = 1;
show variables like ‘%profil%‘;
set profiling = 1;
show profile for query 1;
| 列 | 含义 |
| optimizing | 优化 |
| statistics | 统计 |
| preparing | 准备 |
| executing | 执行 |
| Sending data | 发送数据 |
SELECT A.a,B.b FROM A INNER JOIN B ON A.c = B.c;
标签：user 语句 如何 from xpl 输入 磁盘 ble exec
原文地址：http://www.cnblogs.com/uodut/p/7071142.html
