MySQL查询执行时间比较

Question

i am doing one select qry in my mysql database which contains " order by field desc". I get the resultset within 16 minutes.

Now in the same qry i put "order by field desc limit 5" to get the first 5 records.. But my qry is running for more than 20 minutes.

How can i make the execution faster? Any Ideas?

Thanks- jithkaran

Answer 1

在选择查询中使用top命令尝试

select top(5) * from table order by field desc