Question

ALTER PROCEDURE [dbo].[Expense_monthly_report] @start_date VARCHAR(100), 
                                           @end_date   VARCHAR(100) 
AS 
    BEGIN 
      DECLARE @SQLQuery AS NVARCHAR(max) 
      DECLARE @PivotColumns AS NVARCHAR(max) 

      SET nocount ON; 

      SELECT @PivotColumns = COALESCE(@PivotColumns + ',', '') 
                         + Quotename( date_of_expp) 
      FROM   (SELECT DISTINCT Month(date_of_exp) AS date_of_expp 
              FROM   [dbo].[tbl_exp_details] 
              WHERE  date_of_exp >= @start_date 
                     AND date_of_exp <= @end_date) AS PivotExample 

      SET @SQLQuery = N'SELECT  p.part_id,' + @PivotColumns 
                + ',total_amount      FROM (SELECT part_id,month(date_of_exp) as month_of_exp,exp_amount FROM [dbo].[tbl_exp_details]) as tbl PIVOT( sum(exp_amount) FOR month_of_exp IN (' 
                + @PivotColumns 
                + ')) AS P join (SELECT  part_id,sum(exp_amount) as total_amount      FROM [dbo].[tbl_exp_details] where date_of_exp>=' 
                + @start_date + ' and date_of_exp<=' + @end_date 
                + ' group by part_id) as la on p.part_id=la.part_id' 

      EXEC Sp_executesql @SQLQuery 
    END

我收到错误

日期与int
不兼容

。帮我找出问题。

Answer 1

您尚未在动态查询中分隔日期值。

所以

date_of_exp<=' + @end_date

变为

date_of_exp<= 2017-07-19

计算结果，而int不会隐式转换为日期

date_of_exp <= 1991

使用Sp_executesql并修复此问题的正确方法是：

SET @SQLQuery = N'SELECT  p.part_id,' + @PivotColumns 
                + ',total_amount      FROM (SELECT part_id,month(date_of_exp) as month_of_exp,exp_amount FROM [dbo].[tbl_exp_details]) as tbl PIVOT( sum(exp_amount) FOR month_of_exp IN (' 
                + @PivotColumns 
                + ')) AS P join (SELECT  part_id,sum(exp_amount) as total_amount FROM [dbo].[tbl_exp_details] where date_of_exp>= @start_date and date_of_exp<=@end_date '
                + ' group by part_id) as la on p.part_id=la.part_id' 

  EXEC Sp_executesql @SQLQuery, 
          N'@start_date date, @end_date date', 
          @start_date,
          @end_date

操作数类型冲突：日期与int不兼容选择行时

1 个答案: