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1¡¢ Ç¿´óµÄgroup by
1 select stdname,
2 isnull(sum( case stdsubject when ' »¯Ñ§ ' then Result end), 0 ) [»¯Ñ§],
3 isnull(sum( case stdsubject when ' Êýѧ ' then Result end), 0 ) [Êýѧ],
4 isnull(sum( case stdsubject when ' ÎïÀí ' then Result end), 0 ) [ÎïÀí],
5 isnull(sum( case stdsubject when ' ÓïÎÄ ' then Result end), 0 ) [ÓïÎÄ]
6 from #student
7 group by stdname
ÔÚÕâÀgroup byÓësum + case½áºÏ£¬¿ÉÒÔ½«±í1ÖеļǼ£¨ÐУ©±ä³É±í2µÄ×ֶΣ¨ÁУ©¡£SumÀïÃæÈç¹ûûÓÐcase£¬ÄÇô³öÀ´µÄÖµ£¬Ö»ÄÜÊÇÈ«²¿¿ÆÄ¿µÄ×ܺͣ¬ÓÃÁËcaseÒÔºó£¬¾Í ÊÇij¿ÆµÄ³É¼¨£»È»ºóÕâÀïÓÃÁ˺ü¸¸ösum£¬Ã¿¸ö¿ÆÄ¿Ò»¸ösum£¬ÓÚÊDZí1Öб¾À´Ä³ÈËij¿ÆÕ¼Ò»Ìõ¼Ç¼µÄ“ÐД¾Í±ä³ÉÁ˱í2ÀïijÈËÒ»Ìõ¼Ç¼£¬Ã¿¿Æ×öÒ»¸ö×Ö¶Î ÁË¡£
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2¡¢ ÀûÓÃselect from (select from)µÄģʽÉú³ÉSQLÓï¾ä
1 declare @sql varchar( 4000 )
2 set @sql = ' select stdname '
3 select @sql = @sql + ' ,isnull(sum(case stdsubject when ''' + stdsubject + ''' then Result end),0) [ ' + stdsubject + ' ] '
4 from (select distinct stdsubject from #student) as a
5 select @sql = @sql + ' from #student group by stdname '
6 print @sql
7 exec(@sql)
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4 from (select distinct stdsubject from #student) as &
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