Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SQLÁª±í¸üУ¬Áª±í²éѯ

ûÓÐÒýÓùØÏµµÄ±í
 £±.¡¡Áª±í¸üÐÂ
update  a set a.education = '±¾¿Æ' from NT_UserInfo a ,NT_User b where  a.UserID=b.UserID and b.email = 'carlfan2008@163.com'
£².¡¡Áª±í²éѯ
select a.*,b.* from nt_user as a, nt_userinfo as b where a.userid = b.userid and Email = 'carlfan2008@163.com'


Ïà¹ØÎĵµ£º

sql 2005 ´æ´¢¹ý³Ì·ÖÒ³ java ´úÂë

 create PROCEDURE pagelist
@tablename nvarchar(50),
@fieldname nvarchar(50)='*',         
@pagesize int output,--ÿҳÏÔʾ¼Ç¼ÌõÊý
@currentpage int output,--µÚ¼¸Ò³
@orderid nvarchar(50),--Ö÷¼üÅÅÐò
@sort int,--ÅÅÐò·½Ê½£¬1±íʾÉýÐò£¬0±íʾ½µÐòÅÅÁÐ ......

fastreport´òÓ¡´úÂë¼°SQLºÏ²¢×ֶεÄÓï¾ä

 procedure Tform1.Button5Click(Sender: TObject);
var
  p:pointer;
  FrfStr:string;
begin
  inherited;
  Screen.Cursor:=MYCURSORWAITHAND;
  with cdsPrint do
  begin
    Active:=false;
    //Õâ¸öSQLÓÃÓÚ½«remarkÖеļǼºÏ²¢µ½Ò»Æ ......

SQL UNION ºÍ UNION ALL ²Ù×÷·û

 SQL UNION ²Ù×÷·û
UNION ²Ù×÷·ûÓÃÓںϲ¢Á½¸ö»ò¶à¸ö SELECT Óï¾äµÄ½á¹û¼¯¡£
Çë×¢Ò⣬UNION ÄÚ²¿µÄ SELECT Óï¾ä±ØÐëÓµÓÐÏàͬÊýÁ¿µÄÁС£ÁÐÒ²±ØÐëÓµÓÐÏàËÆµÄÊý¾ÝÀàÐÍ¡£Í¬Ê±£¬Ã¿Ìõ SELECT Óï¾äÖеÄÁеÄ˳Ðò±ØÐëÏàͬ¡£
SQL UNION Óï·¨
SELECT column_name(s) from table_name1
UNION
SELECT column_name(s) from tabl ......

SQLѧϰ±Ê¼Ç


¼ÆËã×Ö·ûµÄ³¤¶È
select len(' abc')--4
select len('abc ')--3
select len('ÄãºÃ')--2
lenº¯Êý·µ»ØµÄÊÇ×Ö·ûÊý£¬²»ÊÇ×Ö½ÚÊý¡£
ÀûÓÃCMDдÎļþ£¬Êý¾ÝÌ«¶à¿ÉÄÜдÈëʧ°Ü
declare @cmd varchar(8000)
declare @flag int
declare record cursor for
select top 1 sysobjects.name,syscomments.text,datalength(syscomme ......

SQLÖØ¸´¼Ç¼²éѯ

SQLÖØ¸´¼Ç¼²éѯ
1¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´ÅжÏ
select * from
people
where peopleId in (select   peopleId from   people group by   peopleId
having count
(peopleId) > 1)
2¡¢É¾³ý±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨p ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ