将Varchar从变量字符串转换为Float并插入SQL Server？

Question

I am new to SQL Server. I have created a script where I import data and insert into SQL Server. The update query works fine but the insert query does not . I get a error

Error converting data type varchar to float.. INSERT INTO dbo.

This is the code

 $amount = trim(str_replace('$','',$data[2]));
// echo ($amount); // prints 1,000,000.00

// INSERT QUERY
//Try 1 : Fails

  $Query  = "INSERT INTO dbo.testtable (id, name, amount) 
                                values ( 11, 'John' , $amount )";

  //Try 2 : Fails

  $Query  = "INSERT INTO dbo.testtable (id, name, amount) 
                                values ( 11, 'John' ,  CONVERT(FLOAT,'$amount') )";

How in the world can I insert a proper float value from the variable ($amount) into SQL Server?

Answer 1

use this:

cast('$amount' as money)

Updates: It actually depends on what's the type of your column amount. If it's varchar, it should not throw an error for 1st line. So, I guess it's something like decimal(18, 2). Refer to the demo here

declare @amount varchar(25)
SET @amount = '1,000.00'

create table #tmp_money (amount FLOAT)
insert into #tmp_money
SELECT cast(@amount as money)

select * from #tmp_money