SQL Server-与工会的错误“操作数类型冲突uniqueidentifier与int不兼容”

Question

I am trying to union 2 tables, one of table has required column type as 'Int' and another table has column type as 'uniqueidentifier'.. because of this when I try to do union of 2 tables I get this error:

Operand type clash uniqueidentifier is incompatible with int

Is there any way I can overcome this issue?

Answer 1

You could skip both column from column list or add NULL :

SELECT col1, col2, col3, col_GUID, NULL as col_INT FROM tab1
UNION ALL
SELECT col1, col2, col3, NULL AS col_GUID, col_INT FROM tab2