SQL - Add up all row-values of one column in a singletable

Question

I\'ve got a question regarding a SQL-select-query: The table contains several columns, one of which is an Integer-column called \"size\" - the task I\'m trying to perform is

Answer 1

It's not as simple as this, is it?

SELECT SUM(SIZE)
FROM Table
WHERE bla = '5'

Answer 2

Are you looking for:

SELECT SUM(Size) FROM MyTable WHERE bal = '5'

You can also (in MSSQL)

SELECT Size, COl1, COl2 FROM MyTable WHERE bla ='5' COMPUTE SUM(Size)

Answer 3

SELECT SUM(size) AS overallSize FROM table WHERE bla = 5;