Question

 SELECT
     (CONVERT(VARCHAR(100), 
      (select SUM(TransactionAmount) as saleamount 
       from ProductSaleInformation 
       where StoreCode = 1 
         and RegionCode = 1 
         and BillDate Between '2015-06-01' and '2015-10-31') - 
      (select SUM(TransactionAmount) as saleamount 
       from ProductSaleInformation 
       where StoreCode = 1 
         and RegionCode = 1 
         and BillDate Between '2015-01-01' and '2015-05-31')) / 
      (select SUM(TransactionAmount) as saleamount 
       from ProductSaleInformation 
       where StoreCode = 1 
         and RegionCode = 1 
         and BillDate Between '2015-01-01' and '2015-05-31') + '%') AS SALESGROWTH

需要帮助将float转换为varchar

Answer 1

您的查询中包含操作/逻辑错误的顺序。

由于括号位置不正确，您将VARCHAR除以FLOAT，我怀疑您的意思是先做所有数学运算，最后将结果转换为VARCHAR来执行字符串连接操作（添加百分号）。

此外，您没有代码格式/缩进功能，这会使更多更容易看到此错误。

试试此更正版本：

SELECT CONVERT(VARCHAR(100),
            (
                select SUM(TransactionAmount) as saleamount
                from ProductSaleInformation
                where StoreCode=1 and RegionCode=1
                    AND BillDate Between '2015-06-01' AND '2015-10-31'
             ) -  (
                select SUM(TransactionAmount) as saleamount
                from ProductSaleInformation
                where StoreCode=1 and RegionCode=1
                    AND BillDate Between '2015-01-01' AND '2015-05-31'
            ) / (
                select SUM(TransactionAmount) as saleamount
                from ProductSaleInformation
                where StoreCode=1 and RegionCode=1
                    AND BillDate Between '2015-01-01' AND '2015-05-31'
            )) + '%' AS SALESGROWTH

Answer 2

要将float转换为varchar，您可以使用CONVERT或CAST功能。像这样：

DECLARE @float FLOAT = 1.2
SELECT CONVERT(VARCHAR(20), @float)
SELECT CAST(@float AS VARCHAR(20))

在SQL Server中将float转换为varchar时发生转换错误

2 个答案: