Question

我处于这样一种情况，我必须动态创建一个查询，从而降低我的搜索结果。我需要在查询中动态添加“AND”条件，具体取决于用户从主题/标准复选框中的选择。

SELECT First_Name, Last_Name, City, Subject_1, Subject_2, Subject_3, 
       Standard_From, Standard_To FROM TutorProfile WHERE City = 'Mumbai'  AND (Subject_1 = 'Maths' OR Subject_2 = 'Maths' OR Subject_3
 = 'Maths') AND (Subject_1 = 'Physics' OR Subject_2 = 'Physics' OR Subject_3 = 'Physics') .. AND (Standar_From = 'Class XII') ..

Answer 1

尝试这样的事情：

DECLARE @SQL NVARCHAR(500)
DECLARE @SubjectCommand VARCHAR(50)

SET @SubjectCommand = ''

IF (SubjectIsSelected)
BEGIN
    SET  @SubjectCommand = 'AND (Subject_1 = ''Maths'' OR Subject_2 = ''Maths'' OR Subject_3 = ''Maths'')'
END

SET @SQL = 'SELECT First_Name, Last_Name, City, Subject_1, Subject_2, Subject_3, 
   Standard_From, Standard_To FROM TutorProfile WHERE City = ''Mumbai''' +@SubjectCommand 

EXEC(@SQL)

缩小搜索结果中的搜索范围

1 个答案: