两个表上的SQL Server查询

Question

我有一个带有两个表的SQL Server数据库，表1列出了成员资格记录，表2列出了每个成员资格记录的名称。表1中每个记录的表2中可以有多个人。

• table_1.MembershipNumber
• table_1.MemberType

• table_1.StartDate

• table_2.MembershipNumber

• table_2.FirstName
• table_2.LastName
• table_2.Age

我想创建一个过滤掉表1中记录的视图，其中表2中任何人的年龄超过50岁。

Answer 1

CREATE VIEW [dbo].[vw_Membership]
  AS 
Select t.MembershipNumber ,tt.FirstName,tt.LastName 
    from MembershipNumber_table_1 t
    INNER JOIN  MembershipNumber_table_2 tt
    ON t.MembershipNumber = tt.MembershipNumber 
        AND MemberType = 'A'
    WHERE (DATEDIFF(yy,MembershipNumber_table_2.Age,GetDate()) -
CASE WHEN((MONTH(MembershipNumber_table_2.Age)*100 + DAY(MembershipNumber_table_2.Age)) > (MONTH(GetDate())*100 + DAY(GetDate()))) THEN 1 ELSE 0 END)>50
GO

OR

WHERE DATEDIFF(YEAR, MembershipNumber_table_2.Age, GETDATE())>50