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分享sql语句的问题！
table1（a1,a2,a3）
table2（a1,a2,a3）
select distinct a1,a2,sum(a3) from
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1)
group by a1,a2
table2（a1,a2,a3）
select distinct a1,a2,sum(a3) from
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1)
group by a1,a2
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yyy431706 2003-08-29
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GZ
king0401 2003-08-29
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谢谢大家
dafu71 2003-08-29
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select a1,a2,sum(a3) from
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1) as aa
group by a1,a2
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1) as aa
group by a1,a2
aierong 2003-08-29
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select a1,t.a2,sum(t.a3) from
(select a1,a2,a3 from table1
union all
select a1,a2,a3 from table2) as t
group by t.a1
(select a1,a2,a3 from table1
union all
select a1,a2,a3 from table2) as t
group by t.a1
aierong 2003-08-29
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你意思是把2个表合并为一个表,再找出a3列的最大项目对应的不同记录吗
txlicenhe 2003-08-29
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select a1,a2,sum(a3) from -- distinct 不必要吧？
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1) tmp -- 指定一个别名
group by a1,a2
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1) tmp -- 指定一个别名
group by a1,a2
txlicenhe 2003-08-29
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select distinct a1,a2,sum(a3) from
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1) tmp -- 指定一个别名
group by a1,a2
(select a1,a2,a3 from table1
union all select a1,a2,a3
from table1) tmp -- 指定一个别名
group by a1,a2
king0401 2003-08-29
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这样写会报错误：在关键字 'group' 附近有语法错误。
有什么解决方法？
有什么解决方法？
