SQL¡¡Êý¾Ý¿âÉú³É×Ô¶¯±àºÅ´úÂë
--exec [P_AutoGenerateNumber] 'reception_apply','generate_code','',7
/*
¹ý³Ì˵Ã÷:Éú³É×Ô¶¯±àºÅ
´´½¨Ê±¼ä:2010Äê1ÔÂ12ÈÕ
×÷Õß:feng
debug:ÉÐδ¿¼ÂDZàºÅÒç³öÇé¿ö
*/
ALTER proc [P_AutoGenerateNumber]
(
@tableName varchar(100)='meeting_apply', --±íÃû
@byteName varchar(100)='generate_code', --×Ö¶ÎÃû
@Remark varchar(10)='M', --±êʾ
@subLen int=4 --½ØÈ¡³¤¶È
)
WITH ENCRYPTION
as
declare @SQLString NVARCHAR(4000)
declare @OutputValue int
declare @subLenVar NVARCHAR(20)
declare @TempValue varchar(20)
set @subLenVar =convert(varchar(20),@subLen)
set @TempValue ='00000000000000000000'
declare @OutputValueToVar varchar(20)
set @SQLString = N'select @OutputValueEx=count(*) from '+@tableName+' where generate_code is not null or generate_code!='''''
EXECUTE sp_executesql @SQLString, N'@OutputValueEx int output',@OutputValueEx= @OutputValue output
if @OutputValue !=0
begin
SET @SQLString = N'SELECT @OutputValueEx=max(cast(right('+@byteName+','+@subLenVar+') as int))+1  
Ïà¹ØÎĵµ£º
Sql Server ÓÐÈçϼ¸Ö־ۺϺ¯ÊýSUM¡¢AVG¡¢COUNT¡¢COUNT(*)¡¢MAX ºÍ MIN£¬µ«ÊÇÕâЩº¯Êý¶¼Ö»ÄܾۺÏÊýÖµÀàÐÍ£¬ÎÞ·¨¾ÛºÏ×Ö·û´®¡£Èçϱí:AggregationTable
Id Name
1 ÕÔ
2 Ç®
1 Ëï
1 Àî
2 ÖÜ
Èç¹ûÏëµÃµ½ÏÂͼµÄ¾ÛºÏ½á¹û
Id Name
1 ÕÔËïÀî
2 Ç®ÖÜ
ÀûÓÃSUM¡¢AVG¡¢COUNT¡¢COUNT(*)¡¢MAX ºÍ MINÊÇÎÞ·¨×öµ½µ ......
SQLÓï·¨ÓëÃüÁî
SELECT Óï¾ä
SELECT[predicate]{*|table.*|[table.]field [,[table.]field2[,...]]} [AS alias1
[,alias2[,...]]]
from tableexpression [,...][IN externaldatabase]
[WHERE...]
[GROUP BY...]
[HAVING...]
[ORDER BY...]
[WITH OWNERACCESS OPTION]
SELECT Óï¾ä°üÀ¨ÏÂÃæ¼¸¸ö²¿·Ö
predicate
......
sqlÓï¾ä²éѯ½á¹ûºÏ²¢union ºÍunion allÓ÷¨
--ºÏ²¢Öظ´ÐÐ
select * from A
union
select * from B
--²»ºÏ²¢Öظ´ÐÐ
select * from A
union all
select * from B
°´Ä³¸ö×Ö¶ÎÅÅÐò
--ºÏ²¢Öظ´ÐÐ
select *
from (
select * from A
union
select * from B) AS T
order by ×Ö¶ÎÃû
--²»ºÏ²¢Öظ´ÐÐ
sel ......
SQL Server .NET Data Provider Á¬½Ó×Ö·û´®°üº¬Ò»¸öÓÉһЩÊôÐÔÃû/Öµ¶Ô×é³ÉµÄ¼¯ºÏ¡£Ã¿Ò»¸öÊôÐÔ/Öµ¶Ô¶¼ÓɷֺŸô¿ª¡£
PropertyName1=Value1;PropertyName2=Value2;PropertyName3=Value3;.....
ͬÑù£¬Á¬½Ó×Ö·û´®±ØÐë°üº¬SQL ServerʵÀýÃû³Æ:
  ......
Ò» µ¥´Ê½âÊÍ(2·Ö/¸ö) 34·Ö
¡¡¡¡Data Êý¾Ý Database Êý¾Ý¿â RDBMS ¹ØÏµÊý¾Ý¿â¹ÜÀíϵͳ GRANT ÊÚȨ
¡¡¡¡REVOKE È¡ÏûȨÏÞ DENY ¾Ü¾øÈ¨ÏÞ DECLARE ¶¨Òå±äÁ¿ PROCEDURE´æ´¢¹ý³Ì
¡¡¡¡ÊÂÎñ Transaction ´¥·¢Æ÷ TRIGGER ¼ÌÐø continue Ψһ unqiue
¡¡¡¡Ö÷¼ü primary key ±êʶÁÐ identity Íâ¼ü foreign key ¼ì ......