sql="select top 1 * from news order by tim desc" 中的top 1是什么作用?如题

sql=select top 1 * from news order by tim desc 中的top 1是什么作用?如题 请问rs.Open sql,conn,1,3和rs.Open sql,conn,3,3有什么区别?sql=select top 1 * from zj where tuijian=-1 order by user_id DESC中的where tuijian=-1 order by user_id select top 1 if (pastart = -1) sql.append(select * from(); sql.append(select nid,sname,sdescription,nprice,sif (pastart = -1)sql.append(select * from();sql.append(select nid,sname,sdescription,nprice,simg,(CASE smctag WHEN '0' THEN '有货'WHEN '1' THEN ' 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 请问 select top 1 1 from ... 请问sql=select * from 招聘信息 order by id sql=select * from x where Min>2 and max SQL 中select 1和select *有什么区别在实际的使用中使用select 1有什么意义? sql 语句中 select * from table where 2=1 的where2=1有什么意思和作用 sql语句中参数乘法select top 4 *from UserInfowhere ID not in(select top 12 idfrom UserInfo ) 这个语句里面 12 用 3*4表示该怎么写啊4是第一个参数 3是第二个参数 ‘｛0｝‘ * （‘｛1｝’-1）这么写不对啊我这 上一页下一页$page.=',';和.($pageval-1).意思其中$page.=',';的这行不要把 $sql=select * from `bbs` limit $page $pa改成$sql=select * from `bbs` limit $page,$pagesize不一样吗?其中$page.=','; 什么意思,把 $sql=select * from 急 from 关键字附近有语法错误string sql = select top + Parameter[5].ToString() + from + TableName + where ColumnsId= + Parameter[1].ToString() + and ZT=1;string sql2 = ;if (Parameter[2].ToString() == 0){sql2 = and IsTop=0; SQL >select count(*) from Teacher where teacherCode=? and teacherPassword=? java.sql.SQLException:SQL >select count(*) from Teacher where teacherCode=? and teacherPassword=?java.sql.SQLException: Can not issue executeUpdate() for SELECTsat com.mysql. $sql=SELECT count(*) as pcount FROM news 和$sql = UPDATE article SET这句是什么意思? 一道C语言选择题,33.假设所有的选课成绩都已确定,显示“101”号课程成绩最高的10%记录信息,正确的SQL命令是（ ）A.SELECT * TOP 10 FROM 选课 ORDER BY 成绩WHERE 课程号=”101”B.SELECT * PERCENT 10 FROM 选 sql语句,求大神看看我这句话哪里有错!select * from ( select FUNCTIONAL_LOCATION,HDR_END_DATE,row_number()over(partition by FUNCTIONAL_LOCATION order by HDR_END_DATE ) mm from T_EODB_CONTRACT_ITM_DEL) where mm=1; select a.* from test a where 1 > (select count(*) from test where name = a.name and val > a.val )sql语句,按name分组显示最大的val值的字段,不明白具体意思,