Question

我有一个查询，我用来连接多个列到一个列但是我得到'学年附近的'语法不正确'。任何想法 - 我不太确定如何在连接中结束案例

select distinct 
    bb.pk1 as 'LearnSourceKey',
    sc.pk1 as 'SISSourceKey',
    row_number () over (partition by bb.pk1 order by sc.SISCourseKey) as 'RowRank'
from
    Source.SISCourse sc
    left join source.SISTerm st on sc.TermSourceKey=st.SISTermKey
    inner join Source.COURSE_MAIN bb
        on bb.batch_uid = substring(CatalogNumber, 1, (len(CatalogNumber) - 1)) + 
            case 
                when st.TermDescription='Semester 1' 
                then 'SEM-1'  + '_' + st.AcademicYear

Answer 1

这是您的查询，基本上是：

case

您的else没有when条款。因此，任何不符合NULL条件的内容都是select distinct bb.pk1 as LearnSourceKey, sc.pk1 as SISSourceKey, row_number () over (partition by bb.pk1 order by sc.SISCourseKey) as RowRank from Source.SISCourse sc left join source.SISTerm st on sc.TermSourceKey = st.SISTermKey inner join Source.COURSE_MAIN bb on st.TermDescription = 'Semester 1' and bb.batch_uid = (left(CatalogNumber, len(CatalogNumber) - 1) + st.AcademicYear );。这意味着您可以将其简化为：

st.AcademicYear

这（与原始查询一样）假设filmList是一个字符串。

Answer 2

案例陈述应该有结束表达

select distinct 
    bb.pk1 as 'LearnSourceKey',
    sc.pk1 as 'SISSourceKey',
    row_number () over (partition by bb.pk1 order by sc.SISCourseKey) as 'RowRank'
from
Source.SISCourse sc
left join source.SISTerm st on sc.TermSourceKey=st.SISTermKey
inner join Source.COURSE_MAIN bb 
      on bb.batch_uid = substring(CatalogNumber,  1, (len(CatalogNumber) - 1)) + 
         case 
            when st.TermDescription='Semester 1' 
            then  'SEM-1'  + '_' + st.AcademicYear 
         end

使用CASE的SQL连接条件

2 个答案: