select from 表 和select from [表]有什么不同?

select from 表 和select from [表]有什么不同? SELECT MAX(account) AS account FROM shop 和 SELECT MAX(account) FROM shop 的区别?shop 是表名,article 是表中的一个字段名. 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 Oracle中有两个表T1和T2,结构相同.且T1中的数据和T2中的数据互不交叉,则select * from T1 union select * from T2 与 select * from T1 union all select * from T2 的结果（ ）A.一定完全相同.B.结果一定相同,只是顺 数据库中select into from 和 insert into select的区别 select * from book limit , insert into a select * from b 和select * into a from b 这两个语句是不是一样的? spring中select * from student,和select * from [数据库名].[dbo].[student],怎么别人用前者可以,我不能 select * from a union select * from b 能详细说下么 select count(*) from 怎么使用 select count(1) from emp select * into dept2 from dept sql语句中加中括号和不加有什么区别吗?比如:SELECT title FROM authors和SELECT [title] FROM [authors]这两个有区别吗? select * from a,b与select * from a inner join b 的取数方式和执行效率有什么不同, 列名acct_month ,acct_year,表名acct_vouch查询最大、小月,最小月要对应最小年select min(acct_month) as start_month from acct_vouch where acct_year=(select min(acct_year) from acct_vouch) select max(acct_month) as cur_month from acct_ select t.*和select *有什么不同 select count和select count的区别 1' union select * from [ADM] union select *