Question

我正试图删除＆＃34; s＆＃34;来自“＃34; years＆＃34;当COUNT（）是＆lt; 2但我的语法由于某种原因不正确：

错误： 关键字＆＃39; IF＆＃39;附近的语法不正确。关键字＆＃39; convert＆＃39;附近的语法不正确。

stuff(
        (
        select ',' + Related_name + ' (' + (select
        IF COUNT(begin_date) > 1 BEGIN convert(varchar(10), COUNT(begin_date))  + ' years)' END
        ELSE BEGIN convert(varchar(10), COUNT(begin_date))  + ' year)'
        from cus_relationship subInnerR
        where subInnerR.master_customer_id = c.master_customer_id
        and subInnerR.related_master_customer_id = innerR.related_master_customer_id
        and subInnerR.relationship_type = 'ADVSPR'
        and subInnerR.relationship_code = 'CLUB'
        and subInnerR.reciprocal_code = 'FACADV')
        from cus_relationship innerR
        where [...]

Answer 1

尝试这样（在评论中由gvee评论，因为这减少了一些重复的代码!!）： -

 select ',' + Related_name + ' (' + (select
    Convert(varchar(10), Count(begin_date)) + ' year' + 
    CASE WHEN Count(begin_date) > 1 THEN 's'    ELSE '' END + ')'
    from cus_relationship subInnerR
    where subInnerR.master_customer_id = c.master_customer_id
    and subInnerR.related_master_customer_id = innerR.related_master_customer_id
    and subInnerR.relationship_type = 'ADVSPR'
    and subInnerR.relationship_code = 'CLUB'
    and subInnerR.reciprocal_code = 'FACADV')
    from cus_relationship innerR
    where [...]

Answer 2

Maybe this helps

在tsql中，您使用CASE代替IF

Answer 3

我不喜欢重复使用相同的代码，所以我会像这样使用CASE：

CONVERT(VARCHAR(10), COUNT(begin_date)) 
+ ' year' 
+ CASE WHEN COUNT(begin_date) > 1 THEN 's' ELSE '' END
+ ')'

为了便于阅读，

在多行上拆分

Answer 4

您需要使用CASE语句而不是IF来执行此操作：

case
    when COUNT(begin_date) > 1 then
        convert(varchar(10), COUNT(begin_date))  + ' years)'
    else
        convert(varchar(10), COUNT(begin_date))  + ' year)'
end

如何在SELECT - SQL SERVER中使用IF / ELSE

4 个答案: