[英]Sql query to convert nvarchar to int
I have to query for total amount of a column using an aggregate function. 我必须使用聚合函数查询列的总量。 The column data type is NVARCHAR(MAX).
列数据类型是NVARCHAR(MAX)。 How can I convert it to Integer?
如何将其转换为整数?
I have tried this: 我试过这个:
SELECT SUM(CAST(amount AS INT)),
branch
FROM tblproducts
WHERE id = 4
GROUP BY branch
...but I'm getting: ......但我得到了:
Conversion failed when converting the nvarchar value '3600.00' to data type int.
将nvarchar值'3600.00'转换为数据类型int时转换失败。
3600.00 is not integer so CAST via float first 3600.00不是整数所以CAST通过浮动优先
sum(CAST(CAST(amount AS float) AS INT))
Edit: 编辑:
Why float? 为何漂浮?
除了gbn的答案,你还需要防范非数字案例:
sum(CASE WHEN ISNUMERIC(Amount)=1 THEN CAST(CAST(amount AS float) AS INT)END )
SELECT sum(Try_Parse(amount as Int Using 'en-US')), branch FROM tblproducts SELECT sum(Try_Parse(金额为Int使用'en-US')),分支FROM tblproducts
WHERE id = 4 GROUP BY branch WHERE id = 4 GROUP BY分支
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