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ItemManage_DemandPlan(ÐèÇó±í)£º
id plantype
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2 ×ÜÌåÉè¼Æ
3 ÐèÇó·ÖÎö
4 Êý¾Ý¿âÉè¼Æ
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id I_Type
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2 ²âÊÔ
3 bugÐÞ¸Ä
4 ÑéÊÕ
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id content
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union all?
UNIONÁªºÏ²éѯ
SQL code:
select id, plantype from ItemManage_DemandPlan union all
select id,I_Type from ItemManage_DevelopPlan
select * from ItemManage_DemandPlan
union all
select * from ItemManage_DevelopPlan
SQL code:
select * from ItemManage_DemandPlan
union all
select * from ItemManage_DevelopPlan
SQL code:
select a.*, b.* from ItemManage_DemandPlan a, ItemManage_DevelopPlan b
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select col1 + col2 from table
SQL code
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