Help with Sql

[Skrim 12]

Database is PostgreSql.

In a table I have:

 

Customer  Amount

10000       100

10020        110

10150        350

10000        -100

10300        200

 

I want to retrieve only customers where Amount is 0 (100-100=0), in this case Customer 10000.

 

How can I do this using Sql?

 

Thanks in advance.

 

Ole

 

 

 

 

Edited July 5, 2021 by Skrim

[Stano 145]

...sum(amount)...

Group by customer

having sum(amount)= 0

[Skrim 12]

Thanks Stano

 

Works great 🙂

 

SELECT customer, SUM(amount)
FROM aTable
Group by customer
having sum(amount)= 0

 

Regards,

Ole