Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

sqlÃæÊÔµÄ

1¡¢²éÕÒ±íÖжàÓàµÄÖظ´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±íÖжàÓàµÄÖظ´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´Åжϣ¬Ö»ÁôÓÐrowid×îСµÄ¼Ç¼
delete from people 
where peopleId in (select   peopleId from people group by   peopleId   having count
(peopleId) > 1)
and rowid not in (select min(rowid) from   people group by peopleId having count(peopleId
)>1)
3¡¢²éÕÒ±íÖжàÓàµÄÖظ´¼Ç¼£¨¶à¸ö×ֶΣ© 
select * from vitae a
where (a.peopleId,a.seq) in   (select peopleId,seq from vitae group by peopleId,seq having
count(*) > 1)
4¡¢É¾³ý±íÖжàÓàµÄÖظ´¼Ç¼£¨¶à¸ö×ֶΣ©£¬Ö»ÁôÓÐrowid×îСµÄ¼Ç¼
delete from vitae a
where (a.peopleId,a.seq) in   (select peopleId,seq from vitae group by peopleId,seq having
count(*) > 1)
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)
5¡¢²éÕÒ±íÖжàÓàµÄÖظ´¼Ç¼£¨¶à¸ö×ֶΣ©£¬²»°üº¬rowid×îСµÄ¼Ç¼
select * from vitae a
where (a.peopleId,a.seq) in   (select peopleId,seq from vitae group by peopleId,seq having
count(*) > 1)
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)


Ïà¹ØÎĵµ£º

C# ÓÃSQLн¨Êý¾Ý¿â

1. ³ÌÐòÈçÏ£º
         string str = "Create Database " + "DBname";
         string con = "Data Source=10.0.0.249\\sql2005;Initial Catalog=master;Persist Security Info=True;User ID=sa;Password=sa";
   &n ......

SQLÖ®11 Êý¾Ý¿âÉè¼Æ

º¯ÊýÒÀÀµ
==========================================
Ò»¡¢º¯ÊýÒÀÀµ¸ÅÄî  
    
  ¡¡¡¡º¯ÊýÒÀÀµÊÇ´ÓÊýѧ½Ç¶ÈÀ´¶¨ÒåµÄ£¬ÔÚ¹ØϵÖÐÓÃÀ´¿Ì»­¹Øϵ¸÷ÊôÐÔÖ®¼äÏ໥ÖÆÔ¼¶øÓÖÏ໥ÒÀÀµµÄÇé¿ö¡£º¯ÊýÒÀÀµÆÕ±é´æÔÚÓÚÏÖʵÉú»îÖУ¬±ÈÈ磬ÃèÊöÒ»¸öѧÉúµÄ¹Øϵ£¬¿ÉÒÔÓÐѧºÅ¡¢ÐÕÃû¡¢ËùÔÚϵµÈ¶à¸öÊôÐÔ£ ......

SQL¸ß¼¶Ê¹ÓÃÊý¾Ý¿â

SQL¸ß¼¶Ê¹ÓÃ
SELECT¸ß¼¶²éѯ
´íÎó´¦Àí
ÊÂÎñ´¦Àí
Êý¾ÝµÄËø¶¨
Óαê
1.SELECT¸ß¼¶²éѯ
Ç°ÃæÒѾ­½éÉÜÁËSELECTÓï¾äµÄÓ÷¨£¬±¾½ÚÖ÷Òª½éÉÜÊý¾Ý»ã×Ü¡¢Áª½Ó²éѯ¡¢×Ó²éѯºÍ¹Ø¼ü´ÊUNIONµÄʹÓá£
(1)Êý¾Ý»ã×Ü
Ϊ¾ö²ßÖ§³ÖϵͳÉú³É¾ÛºÏÊÂÎñµÄ»ã×ܱ¨±íÊÇÒ»ÏÔÓ²¢ÇÒÏ൱ÏûºÄ×ÊÔ´µÄ¹¤×÷¡£SQL Server 2000ÌṩÁ½¸öÁé»îÇÒÇ¿´óµÄ×é¼þ ......

sqlÖÐÓÃ[]µÄÔ­Òò

¼Ó[ ]ÓÃÓÚ¶¨½çÁÐÃû»ò±íÃûµÈÐÅÏ¢£¬ÒÔÇø±ðһЩÌØÊâµÄ²»ºÏÃüÃû¹æÔòµÄ×Ö´®£¬»òÊÇÓëϵͳ±£Áô×ÖÓгåÍ»¡£Èç"user"ÊÇSQL Server±£ÁôµÄ¹Ø¼ü×Ö£¬ËùÒÔÓÃ"select * from user"²éѯ»áÌáʾÓï·¨´íÎó¡£¼ÓÉÏÖÐÀ¨ºÅ£¬ÒÔÉùÃ÷Æä²»ÊDZ£Áô×Ö¡£ "select * from [user]" Èç¹û±íÃû²»Êǹؼü×Ö£¬ÈçCompany£¬ÔòÓÃ"select * from Company"ÊÇûÎÊÌâµÄ£¬²»Ó ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ