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mysql语句查询问题

select t.* from table t order by t.c asc order by 排序 asc升序

select t2.student_name,SUM(score) 总分 from scores t1 inner join students t2 on t1.student_id=t2.student_id and t2.student_id in( select t3.student_id from scores t3,courses t4 where t3.course_id=t4.course_id and t4.course_name...

$sql="SELECT * FROM user_list WHERE name = '$name'"; 单引号不要乱打 还有如果检测结果的话,不要用echo用print_r()除了资源类型,基本都能给你输出 echo语句输出某些类型时是一个空值

请教MySQL 执行查询语句时数据库崩溃重启问题 应用程序需要1.连接2.命令3.接收结果,不考虑数据处理其他打开关闭什么的,就比sql语句多了2步。 如举例,你要有个朋友(有钱的情况),然后借钱,结果还不一定能接到。 而老婆,她又没有钱你知道,...

select * from shipmentlist,shipmentscrib where (shipmentlist.shipmentlistno=shipmentscrib.shipmentlistno) and (year(shipmentlist.shipmentdate)=year(now())) and (month(shipmentlist.shipmentdate)=month(now()) or month(shipmentlis...

pars是什么内容,你的数据源是不是oracle的?

用联合查询把三张表拼成一个表,你想怎么查询怎么查询~(join....on)

用占位符 rs=db.queryExecute("select * from customer where id

试试看 select A.NAME from A left join B ON A.NAME=B.NAME WHERE B.NAME IS NULL

datediff函数在mysql下只有起始时间、结束时间2个参数: SELECT datediff(Obotime,now()) AS balance,Ouid,ObRenttime FROM Outbooks;

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