sql²éѯ±íÖÐ×ֶβ»Öظ´
·½·¨Ò»£º
select distinct name from tablename
·½·¨¶þ£º
select min(fid),name,sex from tablename group by name
×ܼƣº
select distinct name from tablename ´ò¿ªÖظ´¼Ç¼µÄµ¥¸ö×Ö¶Î
select * from tablename where fid in(Select min(fid) from tablename group by name)´ò¿ªÖظ´¼Ç¼µÄËùÓÐ×Ö¶ÎÖµ
select * from tablename where name in(select name from tablename group by name having count(name)=1)´ò¿ªÖظ´ÈÎÒâ´ÎÊýµÄËùÓмǼ
Ïà¹ØÎĵµ£º
´æ´¢½ø³Ì¾ÍÊÇ×÷Ϊ¿ÉÖ´ÐжÔÏó´æ·ÅÔÚÊý¾Ý¿âÖеÄÒ»¸ö»ò¶à¸öSQLÃüÁî¡£
¶¨Òå×ÜÊǺܳéÏó¡£´æ´¢½ø³ÌÆäʵ¾ÍÊÇÄÜÍê³ÉÒ»¶¨²Ù×÷µÄÒ»×éSQLÓï¾ä£¬Ö»²»¹ýÕâ×éÓï¾äÊÇ·ÅÔÚÊý¾Ý¿âÖеÄ(ÕâÀïÎÒÃÇ̸ֻSQL SERVER)¡£Èç¹ûÎÒÃÇͨ¹ý´´½¨´æ´¢½ø³ÌÒÔ¼°ÔÚASPÖе÷Óô洢½ø³Ì£¬¾Í¿ÉÒÔ±ÜÃ⽫SQLÓï¾äͬASP´úÂë»ìÔÓÔÚÒ ......
1.´ò¿ªSQL Server Management Studio ExpressÒÔ“WindowsÉí·ÝÈÏÖ¤”µÄ·½Ê½µÇ¼¡£Èçͼ1£º
ͼ1£º
2.ÔÚSQL Server Management Studio ExpressÖеē¶ÔÏó×ÊÔ´¹ÜÀíÆ÷”--“Êý¾Ý¿â”ÉÏÓÒ¼ü--“¸½¼Ó”¡£Èçͼ2£º
ͼ2£º
3.ÔÚµ¯³öÀ´µÄ“¸½¼ÓÊý¾Ý¿â”´°¿ÚÖе¥» ......
ms sql ¸üбíAÖÐijÁÐΪ±íBÖеÄÖµ
select *
from dbo.NT_areapin
go
select *
from dbo.NT_dict_area
update NT_areapin
set AllNamePin='PengShui'
from NT_areapin
where AreaId='486'
go
update NT_dict_area
set BriefNamePin = NT_areapin.BriefNamePin,AllNamePin = NT_areapin.AllNamePin
from N ......
ÏÖÔÚ·¢ÏÖSQLÓï¾äȷʵÊÇ̫ǿ´óÁË£¬ÒÔºóÓöµ½ÎÊÌâÒª¾¡Á¿ÏȺúÃ˼¿¼Ï£¬²»Òª°´ÕÕ×µÄ·½·¨À´×ö£¡
1.´ÓtblFaultDetailTemp±íÖУ¬ÕÒµ½ID=14µÄÏ²¢½«ËùÁгöµÄËĸö×ֶεÄÖµ¿½±´µ½tblFaultDetail±íÖÐ
Insert into tblFaultDetail(Code,FileType,FaultCode,FaultRect) select Code,FileType,FaultCode,FaultRect from tblF ......
ΪÁË´ó¼Ò¸üÈÝÒ×Àí½âÎÒ¾Ù³öµÄSQLÓï¾ä£¬±¾Îļٶ¨ÒѾ½¨Á¢ÁËÒ»¸öѧÉú³É¼¨¹ÜÀíÊý¾Ý¿â£¬È«ÎľùÒÔѧÉú³É¼¨µÄ¹ÜÀíΪÀýÀ´ÃèÊö¡£
¡¡¡¡1.ÔÚ²éѯ½á¹ûÖÐÏÔʾÁÐÃû£º
¡¡¡¡a.ÓÃas¹Ø¼ü×Ö£ºselect name as 'ÐÕÃû' from students order by age
¡¡¡¡b.Ö±½Ó±íʾ£ºselect name 'ÐÕÃû' from students order by age
¡¡¡¡2.¾«È·²éÕÒ:
¡¡¡¡a.ÓÃ ......