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DB2数据库 CASE WHEN的使用

select CASE WHEN T1.COMMERCIALENDDATE IS NULL THEN T1.INSURANCEMATURITYDATE WHEN YEAR(T1.COMMERCIALENDDATE) = 2014      THEN T1.COMMERCIALENDDATE WHEN YEAR(T1.INSURANCEMATURITYDATE) = 2014 THEN T1.INSURANCEMATURITYDATE ELSE T1.COMMERCIALENDDATE END as m, T1.INSURANCEMATURITYDATE    ,T1.COMMERCIALENDDATE FROM RT_INSURANCEBUY T1

 

DB2数据库 CASE WHEN的使用