0

在我的存储过程中，我从三个表中获取数据，但出现此错误：

将数据类型 varchar 转换为数值时出错。

我认为问题出在：-

'NULL' AS DATE (in 1st query of this SP)------(1)
CONVERT(VARCHAR, tbl_IPD.ipd_doa, 103) AS DATE (in 2nd query of this SP)-----(2)

我的问题是：如何将 (1) 行转换为 varchar

SELECT 
   tbl_CompanyProfile.Company_Name, tbl_CompanyProfile.Company_Address, 
   tbl_CompanyProfile.Company_ContactNo, tbl_CompanyProfile.Company_Email, 
   tbl_CompanyProfile.Company_Website, 
   'NULL' AS NAME, 'NULL' AS DATE,
   'NULL' AS AMOUNT, 'NULL' AS DEPARTMENT, 
   0 AS Age, @from AS StartDate, @to AS EndDate
FROM 
   tbl_CompanyProfile

UNION ALL

SELECT   
   '--', '--',
   '--', '--', '--', 
   tbl_IPD.ipd_pfname + ' ' + tbl_IPD.ipd_plname AS NAME, 
   CONVERT(VARCHAR, tbl_IPD.ipd_doa, 103) AS DATE, 
   ISNULL(SUM(tbl_fee.fee_amount), 0) AS AMOUNT, 
   tblDepartment.DeptName AS DEPARTMENT, tbl_IPD.ipd_age AS Age,  
   @from AS StartDate, @to AS EndDate
FROM            
   tbl_fee 
LEFT OUTER JOIN
   tbl_IPD ON tbl_fee.ipd_id = tbl_IPD.ipd_id 
LEFT OUTER JOIN
   tblDepartment ON tbl_IPD.ipd_dpt = tblDepartment.DeptId 
WHERE        
   (tbl_IPD.ipd_doa BETWEEN @from AND @to)
GROUP BY 
    tbl_IPD.ipd_pfname, tbl_IPD.ipd_plname, tbl_IPD.ipd_doa, tblDepartment.DeptName, tbl_IPD.ipd_age
4

2 回答 2

2

如果您尝试返回一个NULL值，则应删除 上的引号'NULL'，否则您将返回 avarchar而这可能不是您想要做的。

如果我的假设是正确的，那么您的查询应该是这样的。

...NULL AS NAME, NULL AS DATE, NULL AS AMOUNT, NULL AS DEPARTMENT,...
于 2013-03-18T18:03:40.170 回答
0

我认为问题实际上出在AMOUNT列中 - 您NULL在第一个查询中选择（字符串）并尝试将其连接到第二个查询中的数字结果。如果您想NULL在联合中使用实际值，只需从NULL引用中去掉撇号即可。

于 2013-03-18T18:09:51.047 回答