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我想在Select语句中将SQL Server中的以下IIF语句组合在一起。我会怎么做呢?如何在SQL Server 2012中结合多个IIF语句
IIF(CLMD_TYPE2 = TYPE, ID_ID2, NULL),
IIF(CLMD_TYPE3 = TYPE, ID_ID2, NULL),
IIF(CLMD_TYPE4 = TYPE, ID_ID2, NULL),
IIF(CLMD_TYPE5 = TYPE, ID_ID2, NULL),
IIF(CLMD_TYPE6 = TYPE, ID_ID2, NULL),
IIF(CLMD_TYPE7 = TYPE, ID_ID2, NULL),
IIF(CLMD_TYPE8 = TYPE, ID_ID2, NULL) AS DIAG_CD