sql ¾µäÒ»
1.½¨±í
create table temp(rq varchar(10),shengfu nchar(1))
2.²åÈëÊý¾Ý
insert into temp values('2005-05-09','ʤ')
insert into temp values('2005-05-09','ʤ')
insert into temp values('2005-05-09','¸º')
insert into temp values('2005-05-09','¸º')
insert into temp values('2005-05-10','ʤ')
insert into temp values('2005-05-10','¸º')
insert into temp values('2005-05-10','¸º')
3.sql
select rq as 'ÈÕÆÚ',sum(case when shengfu ='ʤ' then 1 else 0 end) as 'ʤ' ,sum(case when shengfu='¸º' then 1 else 0 end) as '¸º' from temp group by rq
4.²âÊÔһϰɡ£¡£
ÈÕÆÚ Ê¤ ¸º
2005-05-09 2 2
2005-05-10 1 2
Ïà¹ØÎĵµ£º
Merge statement
function benefits: 1) provides the ability to conditionally update, insert or delete data into a database table. 2) performs an update if the row exists, and an insert if it is a new row. --> 1) avoids seperate updates, 2) increase performance and ease of use. 3) is useful in dat ......
CREATE VIEW MYVIEW
AS
SELECT * from bjxxdiweb_database2007.dbo.bm_tongji
UNION ALL
SELECT * from aa.DBO.chen
select * into aa..chen from bjxxdiweb_database2007.dbo.bm_tongji where 1=2
˵Ã÷£ºÊý¾Ý¿âAµÄ±íµÄ×Ö¶ÎÃû±ØÐëºÍÊý¾Ý¿âBµÄ±íµÄ×Ö¶ÎÃûÏàͬ£¬°üÀ¨Êý¾ÝÀàÐ͵ȡ£ ......
(×¢:outerµÄÒâ˼¾ÍÊÇ"ûÓйØÁªÉϵÄÐÐ"¡£)
1.cross join È«ÍâÁ¬½Ó(µÑ¿¨¶û³Ë»ý)
SELECT A.*, B.* from A FULL OUTER JOIN B ON A.ID = B.ID
2.inner join ÄÚÁ¬½Ó(Ôڵѿ¨¶û³Ë»ýµÄ½á¹û¼¯ÖÐÈ¥µô²»·ûºÏÁ¬½ÓÌõ¼þµÄÐÐ)
SELECT A.* from A INNER JOIN B ON A.ID=B.ID
3.left outer join ×óÍâÁ¬½Ó(ÔÚinner joinµÄ½á¹ ......
Êý¾ÝÀàÐÍ
ÔÚ Microsoft SQL ServerÖУ¬Ã¿¸öÁС¢¾Ö²¿±äÁ¿¡¢±í´ïʽºÍ²ÎÊý¶¼ÓÐÒ»¸öÏà¹ØµÄÊý¾ÝÀàÐÍ£¬ÕâÊÇÖ¸¶¨¶ÔÏó¿É³ÖÓеÄÊý¾ÝÀàÐÍ£¨ÕûÐÍ¡¢×Ö·û¡¢money µÈµÈ£©µÄÌØÐÔ¡£SQL Server ÌṩϵͳÊý¾ÝÀàÐͼ¯£¬¶¨ÒåÁË¿ÉÓë SQL Server Ò»ÆðʹÓõÄËùÓÐÊý¾ÝÀàÐÍ¡£ÏÂÃæÁгöϵͳÌṩµÄÊý¾ÝÀàÐͼ¯¡£
¿ÉÒÔ¶¨ÒåÓû§¶¨ÒåµÄÊý¾ÝÀàÐÍ£¬ÆäÊÇϵͳÌá ......
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER proc [dbo].[pr_xls_to_tb]
@path varchar(200),--EXCEL·¾¶Ãû
@tbName varchar(30),--±íÃû
@stName varchar(30) --excelÖÐÒª¶ÁµÄSHEETÃû
as
declare @sql varchar(500),--×îºóÒªÖ´ÐеÄSQL
@stName_Real varchar(35),--ÕæÕýµÄSHEETÃû
......