Question

此程序运作良好，直到我决定按日期范围获取报告。表中的CreatedDate列的数据类型为datetime。我将c＃中的日期作为文本传递，例如：＆＃39; 2014-09-31＆＃39;。这个论点有时也可能是空的。

现在我没有得到任何结果。我也尝试转换为varchar而不是date。我哪里错了。

如果我只是删除了添加的＆＃39;部分，查询再次正常工作。

ALTER PROCEDURE GetReport
(
 @StartDate varchar(10),
 @EndDate varchar(10)
)
AS
BEGIN
 SET NOCOUNT ON;
     IF (@StartDate = '')
     SET @StartDate = NULL 

     IF (@EndDate = '')
     SET @EndDate = NULL

DECLARE @query VARCHAR(MAX)
DECLARE @questions VARCHAR(MAX)
SELECT @questions = STUFF((....some code)  

SET @query = 'SELECT * FROM
                    (
                      SELECT asq.QuestionText, asa.Comments, 
                             ROW_NUMBER() OVER(PARTITION BY asa.FkQuestionId
                             ORDER BY asa.Comments) Seq
                             FROM Answers AS asa 
                             LEFT JOIN Questions AS asq ON    
                             asa.FkQuestionId = asq.QuestionId

                  //---added this part------
                    WHERE (asa.CreatedDate) >= CONVERT(date,'+@StartDate+') 
                    OR CONVERT(date,'+@StartDate+') IS NULL)
                    AND (asa.CreatedDate) <= CONVERT(date,'+@EndDate+') OR 
                    CONVERT(date,'+@EndDate+') IS NULL)
                 //---end------

                     ) AS t    
                     PIVOT
                        (
                          MIN(t.Comments)    
                          FOR t.QuestionText IN ('+@questions+')    
                        ) AS pvt'                       
            EXECUTE (@query)
END

Answer 1

如果您的列CreatedDate是数据类型datetime，那么您需要转换为日期以删除时间部分。时间部分可能不是00:00:00

                WHERE ( CAST(asa.CreatedDate AS DATE) >= CONVERT(date,'+@StartDate+') 
                OR CONVERT(date,'+@StartDate+') IS NULL) )
                AND ( CAST(asa.CreatedDate AS DATE) <= CONVERT(date,'+@EndDate+') OR 
                CONVERT(date,'+@EndDate+') IS NULL) )

在动态sql中传递日期参数

1 个答案: