功能強大的SQL語句

1. 複製表結構

select * into b from a where 1=0;

insert into b(a, b, c) select d, e, f from a;

insert into b select * from a;

select a.a, a.b, a.c, b.c, b.d, b.f from a left out join b on a.a = b.c;

select * from a where datediff("minute", 開始時間字段, getdate())>時間差

delete from a where not exists(select id from b where a.infid=b.infid );

select a.num, a.name, b.upd_date, b.prev_upd_date 

from table1,(select x.num, x.upd_date, y.upd_date prev_upd_date 
from (select num, upd_date, inbound_qty, stock_onhand 
from table2 
where to_char(upd_date,』』yyyy/mm』』) = 
to_char(sysdate, 』』yyyy/mm』』)) x, 
(select num, upd_date, stock_onhand 
from table2 
where to_char(upd_date,』』yyyy/mm』』) = 
to_char(to_date(to_char(sysdate, 』』yyyy/mm』』) 
|| 』』/01』』,』』yyyy/mm/dd』』) - 1, 』』yyyy/mm』』) ) y, 
where x.num = y.num （+）and x.inbound_qty 
+ nvl(y.stock_onhand,0) <> x.stock_onhand ) b 
where a.num = b.num;

select * from a 

where not exists(select id from b where a.id=b.id) 
and a.a="*"
and a.b="*"
order by a.c,a.d,a.e;

功能強大的SQL語句

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