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
原文：http://www.cnblogs.com/ShaYeBlog/p/4155940.html