Question

我将如何结合这两个陈述。基本上这是一个搜索，我希望用户能够搜索姓名，公司或笔记。 Notes在另一个名为act的表中。其中有一个CID的外键。我希望它只返回与已填写的内容相匹配的结果。所以搜索名称：Bob注意：高尔夫不会返回所有在笔记中有高尔夫球的用户，但只会返回名字为bob且在注释字段中有高尔夫球的人。

我遇到的问题是如果Notes确实返回超过1行，那么它会破坏我使用第一行语句的机会。

我正在使用SQL-Server 2005.谢谢

第一声明：

SELECT DISTINCT CID, Name, Comp, Email
From Con
Where (Name IS NULL OR Name  LIKE '%' + @name + '%')
AND   (Comp IS NULL or Comp LIKE '%' + @comp + '%')

第二声明：

If @notes <> ''
Begin
SET @newid = 
(
Select CID    
From Act
Where Note LIKE  '%' + @notes + '%'
)
Select DISTINCT CID, Name, Comp, Email
From Contacts  c
Where (CID= @newid) 
End

Answer 1

SELECT DISTINCT CID, Name, Comp, Email
From Con
Where (Name IS NULL OR Name  LIKE '%' + @name + '%')
    AND   (Comp IS NULL or Comp LIKE '%' + @comp + '%')
    AND (
        @notes = ''
        OR EXISTS (
            Select CID    
            From Act
            Where Note LIKE  '%' + @notes + '%'
                AND @notes <> ''
                AND Act.CID = Con.CID
        )
    )

Answer 2

SELECT DISTINCT CID, Name, Comp, Email
From Con
Where (Name IS NULL OR Name  LIKE '%' + @name + '%')
AND   (Comp IS NULL or Comp LIKE '%' + @comp + '%')
UNION ALL
Select DISTINCT CID, Name, Comp, Email
From Contacts  c
Where (CID = (Select CID From Act Where @notes <> '' AND Note LIKE  '%' + @notes + '%'))

SQL创建搜索语句问题

2 个答案: