Sql Sum function giving different data every time running query

Question

I have a table A , containing Column [GL_Amount] of datatype varchar GL_Amount contain following data :: -856.32 ,-261.60 ,-15.04 ,537.11

When I apply below query ::

 Select Count(Cast(GL_Amount as Float)) From TableA 

So, every time i run this query i get different result.

I need to correct this thing

Answer 1

You probbaly want to sum .

Select SUM(Cast(GL_Amount as  decimal(10,2))) 
From TableA 

And float is inaccurate. Use a fixed-point data type like decimal . Or use an automatic conversion

Select SUM(GL_Amount * 1.0) 
From TableA 

Answer 2

TRY THIS

SELECT SUM(Convert(Money, GL_Amount)) GL_Amount
FROM TableA