一个查询既有order by desc 又有LIMIT下的排序如何建立索引一个查询既有order by desc 又有limit 的如何建立索引一个表a没有建立索引也没主键.select * from (select * from a where id ='12345' order by date desc lim

一个查询既有order by desc 又有LIMIT下的排序如何建立索引一个查询既有order by desc 又有limit 的如何建立索引一个表a没有建立索引也没主键.select * from (select * from a where id ='12345' order by date desc lim order by 2 desc 0 order by weight desc,selecttime desc LIMIT order by Phone_Number desc limit limit 1 vf中的order by 3 desc 数据库查询语句中order by asc/desc,如何对当前字段进行排序的,其原理或比较的依据是什么?------------------------姓名|------------------------a |------------------------ab |------------------------如以上数据表 sql = Select * from product_series order by index desc,id asc 我想写查询id小于等于7的序列,怎么改 order by 1 desc 可以更改其它值吗 select a,b from 表名 group by a,b order by count(*) desc 英语翻译select top 4 * from shop_books where anclassid = (select anclassid from shop_books where bookid = &request(id)&) order by liulancount ,chengjiaocount,adddate desc这段代码大概的意思就是显示,查询字段的前4个数据,而 在SELECT-SQL语句的ORDER BY子句中,DESC表示按什么输出 select count(*) as total from 'test' order by id desc 希望得到正解 sqltext4=select top 2 * from stock order by Look_Count desc是什么意思? select * FROM 1 where 1=1 {0} order by 1_1 desc nsql=select * from gonggao where passed=1 order by id desc 英语翻译select * from a order by decode(a.xx,50,1,-1)desc 在写SQL-SELECT命令,排序时常会有OEDER BY 1 DESC,ORDER BY 2 DESC,其中的数字1,2表示什么? ACCESS显示条数问题sql=select top 5 * from user order by hy descset us=server.createobject(adodb.recordset)us.open sql,conn,1,1order by hy desc hy是一个积分!我想要着积分多少显示五条出来!这样是对的!但是问题出现