MySQL使用单列索引和多列索引
Select peopleid FROM people Where lastname='Sullivan'; Select peopleid FROM people Where age='17'; Select peopleid FROM people Where lastname='Sullivan' AND age='17';
?
发布时间： 2013-07-08 14:13:00 作者： rapoo
MySQL使用单列索引和多列索引
Select peopleid FROM people Where lastname='Sullivan'; Select peopleid FROM people Where age='17'; Select peopleid FROM people Where lastname='Sullivan' AND age='17';
?