無効な列名

Question

SELECT Ad.Id, Newspaper, 
    (select Organization from JobOrganization where JobOrganization.Id = Ad.OrganizationId) as Organization, 
    Ad.PublishDate, Ad.LastDate,Ad.Url, Job.Id as JobId, 
    (select JobTitle from JobTitle where JobTitle.Id = Job.TitleId) as JobTitle1, 
    QualificationId, ExpInYears, CategoryId 
    FROM Ad inner join Job on Ad.Id = Job.AdId 
    Where JobTitle1 Like @title or @title is null 
    Order by 
case When @sortCol='PublishDate' and @sortDir='ASC' Then Ad.PublishDate End ASC, 
case When @sortCol='PublishDate' and @sortDir='DESC' Then Ad.PublishDate End DESC, 
case When @sortCol='LastDate' and @sortDir='ASC' Then Ad.LastDate End ASC, 
case When @sortCol='LastDate' and @sortDir='DESC' Then Ad.LastDate End DESC 

エラー：列名 'JobTitle1'が無効です。

私は

Answer 1

ようにしてみてください、私はその怖いSQL-2008を使用していますあなたは句、

SELECT Ad.Id, Newspaper, 
    (select Organization from JobOrganization where JobOrganization.Id = Ad.OrganizationId) as Organization, 
    Ad.PublishDate, Ad.LastDate,Ad.Url, Job.Id as JobId, 
    (select JobTitle from JobTitle where JobTitle.Id = Job.TitleId) as JobTitle1, 
    QualificationId, ExpInYears, CategoryId 
    FROM Ad inner join Job on Ad.Id = Job.AdId 
    Where (select JobTitle from JobTitle where JobTitle.Id = Job.TitleId)Like @title or @title is null 
    Order by 
case When @sortCol='PublishDate' and @sortDir='ASC' Then Ad.PublishDate End ASC, 
case When @sortCol='PublishDate' and @sortDir='DESC' Then Ad.PublishDate End DESC, 
case When @sortCol='LastDate' and @sortDir='ASC' Then Ad.LastDate End ASC, 
case When @sortCol='LastDate' and @sortDir='DESC' Then Ad.LastDate End DESC 

ので、その場合には、私はビューを使用しているところでエイリアスを使用することはできません。..

Answer 2

JobTitle1参照名のスコープは、（@titleまたは@title同様JobTitle1がnullの場合は）ここに欠けている、 この(Where Ad.JobTitle1 Like @title or @title is null)

Answer 3

WHERE句はSELECT句の前に評価されるため、WHERE句にエイリアスを使用することはできません。