错误156严重性15状态1关键字IF附近的语法不正确[重复]

Question

这个问题已经在这里有了答案：

• 如何在T-SQL存储过程中使用可选参数？ 6个答案

第25行发生错误：我正在编写存储过程，该过程应根据用户选择的组合返回数据。 例如，我有3种不同类型的过滤器（城市/区域/供应商类型）。 如果用户选择City = xyz和Area = pqr，则结果应为仅City = xyz和Area = pqr的所有数据。 如果用户未选择任何选项，则我为所有3个参数设置的值等于null，并且应从数据库返回所有行。 注意：以上三列应始终在数据库中包含数据。 我创建了一个[WEBMethod]，在其中使用sql连接调用此存储过程。 并使用AJAX jquery传递所有参数。

 ALTER PROCEDURE [dbo].spGetVendorbyFilter
                      @PageNumber INT,
                      @PageSize   INT,
                      @city       VARCHAR(200),
                      @area       VARCHAR(200),
                      @vendortype VARCHAR(200)
AS
  BEGIN
      DECLARE @StartRow INT
      DECLARE @EndRow INT

      SET @StartRow = ( ( @PageNumber - 1 ) * @PageSize ) + 1;
      SET @EndRow= @PageNumber * @PageSize;

      WITH Result
           AS (
               SELECT *,
                      Row_number()
                        OVER (
                          ORDER BY VendorID ASC) RowNumber
               FROM   tblVendor

              ) 

     IF (@city IS NOT NULL AND @area IS NULL AND @vendortype IS NULL)
      SELECT *
      FROM  Result where City=@city AND RowNumber BETWEEN @StartRow and @EndRow
     ELSE IF (@city IS NULL AND @area IS NOT NULL AND @vendortype IS NULL)
       SELECT *
      FROM  Result where Area=@area AND RowNumber BETWEEN @StartRow and @EndRow
     ELSE IF (@city IS NULL AND @area IS NULL AND @vendortype IS NOT NULL)
       SELECT *
      FROM  Result where Category=@vendortype AND RowNumber BETWEEN @StartRow and @EndRow
     ELSE IF (@city IS NOT NULL AND @area IS  NOT NULL AND @vendortype IS NULL)
       SELECT *
      FROM  Result where City=@city And Area=@area AND RowNumber BETWEEN @StartRow and @EndRow
     ELSE IF (@city IS NOT NULL AND @area IS NULL AND @vendortype IS NOT NULL)
       SELECT *
      FROM  Result where City=@city And Category=@vendortype AND RowNumber BETWEEN @StartRow and @EndRow
     ELSE IF (@city IS NULL AND @area IS  NOT NULL AND @vendortype IS NOT NULL)
       SELECT *
      FROM  Result where Area=@area And Category=@vendortype AND RowNumber BETWEEN @StartRow and @EndRow
     ELSE 
         SELECT *
      FROM  Result WHERE RowNumber BETWEEN @StartRow and @EndRow

END

Answer 1

您不能使用这样的CTE 。 CTE应该以SELECT/INSERT/DELETE之一结尾。

根据您的If条件，当@city为NULL您的ELSE条件将失败，因为您正在比较City=@city 。 如果没有错，您正在寻找。

ALTER PROCEDURE [dbo].[Spgetvendorbyfilter] @PageNumber INT,
                                            @PageSize   INT,
                                            @city       VARCHAR(200),
                                            @area       VARCHAR(200),
                                            @vendortype VARCHAR(200)
AS
  BEGIN
      DECLARE @StartRow INT
      DECLARE @EndRow INT

      SET @StartRow = ( ( @PageNumber - 1 ) * @PageSize ) + 1;
      SET @EndRow= @PageNumber * @PageSize;

      WITH Result
           AS (SELECT *,
                      Row_number()
                        OVER (
                          ORDER BY VendorID ASC) RowNumber
               FROM   tblVendor
               WHERE  ( City = @city
                         OR @city IS NULL )
                      AND ( Area = @area
                             OR @area IS NULL )
                      AND ( Category = @vendortype
                             OR @vendortype IS NULL ))
      SELECT *
      FROM   Result
      WHERE  RowNumber BETWEEN @StartRow AND @EndRow
  END