Question

I Have a table that looks something like this:

ComputerID | Free_Space | Disk_Size
------------------------------------------
Computer1  | 10         | 15
Computer1  | 10         | 10
Computer1  | 05         | 10
Computer2  | 05         | 05
Computer2  | 05         | 10
Computer3  | 11         | 15
Computer3  | 04         | 05

I need to achieve something like this:

ComputerID | Free_Space | Disk_Size
------------------------------------------
Computer1  | 25         | 35
Computer2  | 10         | 15
Computer3  | 15         | 20

I’ve tried something like this but with no success.

 SELECT ComputerID,
 SUM(free_space/1000000000) AS 'Total Free Space',
 SUM(disk_size/1000000000) AS 'Total Size'
 FROM myTable
 ORDER BY ComputerID

Any help would be much appreciated.

Answer 1

You need a GROUP BY clause

SELECT
    ComputerID,
    SUM(free_space/1000000000) AS "Total Free Space",
    SUM(disk_size/1000000000) AS "Total Size"
FROM
    myTable
GROUP BY
    ComputerID
ORDER BY
    ComputerID

Note also that most SQL dialects use the single quotes as string delimiters and double quotes as delimiters for column names. With SQL Server you can also used square brackets

[Total Free Space].