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SQL code:
declare @t varchar(5000)
set @t=''
select @t=@t+',[È¡Ïû·ÖÎö-'+quXiaoFenXi+']=sum(case when [quXiaoFenXi]='+quotename([quXiaoFenXi],'''')+' then shangPinZongShu else 0 end)'
from tb_gyyDingDan where zhuangtai =0 group by quXiaoFenXi
print(@t)
declare @s varchar(8000)
set @s=''
set ......

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ÇóA != 1 and B != 2 ÒÔÍâµÄ¼Ç¼
a!=1 and b!=2 ÒÔÍ⣿

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select * from table where a = 1 or b = 2

Èç¹ûÊÇA != 1 and B != 2µÄ»°
select * from table where a <> 1 and b <> 2

where not(A!=1 and B!=2)

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Èç¹ûÊÇA != 1 and B != 2µÄ»°
......

SQLÓï¾äЧÂÊÎÊÌâ - ÆäËûÊý¾Ý¿â¿ª·¢ / ÆäËûÊý¾Ý¿â

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select * from
  ±íA LEFT OUTER JOIN ±íB ON (±íA.id || ' ' =±íB.id) ,±íC , ±íD, ±íE
WhereÆäËûÌõ¼þ
select * from
  ±íA ,±íB ,±íC , ±íD, ±íE
Where ÆäËûÌõ¼þ and ±íA.id || ' ' =±íB.id

Èç¹û¸÷ÖÖÌõ¼þÊ ......

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ÓÐÈçÏÂÁ½¸ö±í
tb1
col  col1
abc  111 
cde  111 
qaz  222   
tgb  222

tb2
col2  col3
abc    111 
qaz    222 

ÎÒÔõô²éѯTB1±íÄÄЩÊý¾ÝÔÚTB2±íÊÇûÓеÄ
select  *&n ......

sqlÓï¾ä»ñȡҶ×Ó½Úµã

±í½á¹¹ Ϊ
id parentid name
1    0
2    0
3    1
4    3
5    2
ÊäÈë0ÏÖÔÚÏëµÃµ½
4 5
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http://blog.csdn.net/wufeng4552/archive/2009/09/30/4619995.aspx

ÎÒÒªµÄÊÇÒ¶×ӽڵ㣬¾ÍÊÇ×îµ×²ãµÄ½ ......

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