select * into a from a..a 请问,这句中的a....有什么用
select * into a from a..a 请问,这句中的a....有什么用
insert into a select * from b 和select * into a from b 这两个语句是
select * into b from a where 11
select * from a,b与select * from a inner join b 的取数方式和执行效率有什么
select * from a union select * from b 能详细说下么
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
select *from A where A.a like '%1%'||'%'
select ** from A where A.id in (select id from B where ****)
Select a username是什么意思
to select a
Select a password是什么意思?
Select a country是什么意思