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?

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? select * into dept2 from dept select * into b from a where 11 下列变量名中正确的是（ ）.A．3S B．Print C．Select My Name D．Select_1 外加为什么啊 数据库中select into from 和 insert into select的区别 select count (1)V_COUNT := 0;SELECT COUNT(1) INTO V_COUNT FROM CUST WHERE CUST_ID = ARG_CUST_ID;IF V_COUNT = 0 THEN我是个初学者,今有如上这么一段程序,里面select count(1)是什么意思? ''' || 变量名|| ''' || check_date || ''' STAT_DATE, insert into REC_OVER(ORG_ID) select '1' from dual where not exists (select ORG_ID from REC_OVER )insert into REC_OVER(ORG_ID) select '1' from dual where not exists (select ORG_ID from REC_OVER ) 请问oracle里这样的语句,为什么在sql/plus可 select top 1 SELECT select * from (select * from 表名) 这样的语法中括号里的查询语句是什么意思.为什么不直接from表名select M.* ,case when M.num>1 then M3.Edescs else M3.Edesc end fqtyut,M3.Edesc fpriceut,M4.tradec fcountryfrom (SELECT INVNO,HS abap 中 select.into 和 move.to 的区别! insert into a select * from b 和select * into a from b 这两个语句是不是一样的? 定义变量名的要求 stata中su 变量名, 我用between and最后查出来了,Select * from [表名] where createtime between '2011-1-17 00: select Field_Content,ID*1 as ID,[index]=identity(int,1,1) into #temp from user_Pro where categoryid= + id+ order by indexid desc; select * from #temp; drop table #temp; select Field_Content,ID*1 as ID,[index]=identity(int,1,1) into #temp from user_Pro where categoryid= + id+ order by indexid desc; select * from #temp; drop table #temp;