How do I convert a varchar price column containing a currency symbol and then sum it?

Question

I have a table called tbl_procie which has the following structure:

CREATE TABLE `tbl_procie` (
    `id` int,
    `price` varchar(25)
);

Data:

id  price
 1   $2.5
 2   $5.3

I want to be able to SUM() the price however it is currently a varchar column also containing currency symbols. I should get the answer 7.8 .

Answer 1

SELECT SUM(REPLACE(price,'$','')) AS cr 
FROM TABLENAME 
WHERE Valet_Company = "Demo Company"

Answer 2

SELECT SUM(price) AS [Price Total] FROM tbl_temp

或者，如果没有自动删除$符号尝试

SELECT SUM(TRIM(LEADING '$' FROM price)) AS [Price Total] FROM tbl_temp

Answer 3

尝试以下：

select sum(cast(price as double)) from tbl_temp