1、语法： 字段1 IS NULL THEN '空' ELSE '不为空' END AS STATUS
SELECT plan.aaaa, plan.bbbb, ecn.PUID, TO_CHAR( app.PCREATION_DATE, 'YYYY' ) AS year, TO_CHAR( app.PCREATION_DATE, 'mm' ) AS month, CASE WHEN worksp.PDATE_RELEASED IS NULL THEN '未完成' ELSE '已完成' END AS STATUS
在Oracle 中可用，其他数据库没有测试过
标签：STATUS,END,app,else,SQL,DATE,PCREATION,NULL,写法 From： https://www.cnblogs.com/wwssgg/p/17698854.html