这段语句 求解释啊SELECT 1USE TEMPINDEX ON 订单号 TO ddh1SELE 2USE ORDERINDEX ON 订单号 TO ddh2SET RELATION TO 订单号 INTO ADO WHILE .NOT.EOF()REPLACE 总金额 WITH temp.总金额SKIPENDDOBROW其中一条语句是 SET RELATION TO 订

这段语句 求解释啊SELECT 1USE TEMPINDEX ON 订单号 TO ddh1SELE 2USE ORDERINDEX ON 订单号 TO ddh2SET RELATION TO 订单号 INTO ADO WHILE .NOT.EOF()REPLACE 总金额 WITH temp.总金额SKIPENDDOBROW其中一条语句是 SET RELATION TO 订 select id,name from student where id in ( select id from score having count(id)>=2 );以上这段语句有没语法错误.SQL语句 Select Case语句到底是什么意思?Private Sub C1_Click(Index As Integer)Select Case IndexCase 1Timer1.Enabled = FalseCase 0Timer1.Enabled = TrueEnd SelectEnd Sub这段的index是神马?case1、0又是神马? 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; 在SQL语句中USE pubs SELECT DISTINCT title FROM title WHERE price>(SELECT MIN(price)FROM titleGROUP BY typeHAVING type='trad_cook')本人是初学者,请大家帮我解释每句的意思,讲解一下这种语句的语法结构, 求解这段verilog语句中的编译错误module create_select(input wire [1:0] switch,input wire clk,output reg [3:0] select);reg [5:0] cnt; initial cnt select 表列名1 into :变量名1 from 表名 where 表列名1=:变量名2; 这个语句怎么解释? 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 vb select case 这个语句? 关于SQL语句里面的A.XX,和B.select B.kecheng,B.score,B.xuehaofrom(select kecheng ,max(score) AS score from jiaScore group by kecheng) A,jiaScore Bwhere A.kecheng = B.kechengand A.score = B.score例如我这段数据库语句,A.kecheng和B.keche insert into a select * from b 和select * into a from b 这两个语句是不是一样的? 求解释语句：权胜才必有辱,威胜德必有祸. 求单表查询的hql语句怎么写sqL如下：select * from aaa20 where aaae2001 = '11111111';求hql语句写法 select case 语句里 可以再套select case 这句SQL语句是什么意思.ql=select distinct(selabel) from.sql=select distinct(selabel) from kcwl_labprosellog where isdel=0 &sqlfile& and selabel not in (select distinct(selabel) from kcwl_labprosell) 这个语句是什么作用的.说具 SELECT S_student.*,kechengming FROM S_student,course WHERE S_student.xuehao = course.xuehao(*);帮忙看一下这语句怎么总执行错误啊,说'*'附近有语法错误,郁闷啊, select * from book where 1=1这个条件语句中1=1是什么意思? SELECT ROUND(TO_NUMBER(sysdate - LAST_LOGIN_TIME) * 24 ) timdif,LOGIN_FAIL_C 这句sql语句是什么意呢?