select * into b from a where 11

select * into b from a where 11 insert into a select * from b 和select * into a from b 这两个语句是不是一样的? select * into dept2 from dept select * from a union select * from b 能详细说下么 数据库中select into from 和 insert into select的区别 PLSQL中复制表select * into b from a where 11这句话中where 11在这里怎么理解 insert into a (select * from b)和把记录取出来然后分别insert那个的效率高? ms sql :select * from (select *from b) as xxx where 和 select * from (select *from b) xxx where区select * from (select *from b) as xxx where…… 和 select * from (select *from b) xxx where……的区别别告诉我是一样的.因为我有一 select * from book limit , select c.*,d* from ( select 图号 from ( SELECT a.*,b.存货编码 FROM 未明图号 as a left OUTER JOIN 存select c.*,d* from ( select 图号 from (SELECT a.*,b.存货编码FROM 未明图号 as a left OUTER JOIN 存货档案 as bON a.图号=b.规 oracle 中select into是什么意思把一个表里面的内容复制到另一个吗 还是别的 是不是还要先创建一个表啊create table aaa as select * from bbb 这样的效果 用select into 能做到么? 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 count() into :r_count from zw_kmyeb where km_code like '5%' and qcye0;messagebox('r_count',r_count)like 5%是什么? select * into a from a..a 请问,这句中的a....有什么用a..是另一个库吗 select hkont from bseg into table itab_bseg where ( hkont like '1001%' or hkont like '1002%' ).中%是什么意思 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? select count(c) from (select b from TUserBankLogSum b group by b.tid) as c 这条hql是错的按照这个意思应该怎么写 select from 表 和select from [表]有什么不同?