chapter5_datachanges.txt

来自「sql的原代码可以供学习sql的人提供好的学习材料」· 文本 代码 · 共 10 行

INSERT INTO FavCategory (CategoryId, MemberId)
SELECT 9, MemberId FROM MemberDetails  MD1
WHERE EXISTS 
     (SELECT * from FavCategory FC1 
      WHERE FC1.CategoryId = 1 AND FC1.MemberId = MD1.MemberId
                     AND NOT EXISTS 
                                 (SELECT * FROM FavCategory  FC2 
                                  WHERE FC2.MemberId = FC1.MemberId AND                          
                                  FC2.CategoryId = 9));