为具有较少列的表添加额外的列作为null
Select Col1, Col2, Col3, Col4, Col5 from Table1UnionSelect Col1, Col2, Col3, Null as Col4, Null as Col5 from Table2
为具有较少列的表添加额外的列作为null
Select Col1, Col2, Col3, Col4, Col5 from Table1UnionSelect Col1, Col2, Col3, Null as Col4, Null as Col5 from Table2
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