it was my interview question

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SQL-Server-2005

There is table
id | value
==== =======
1 | 100
1 | 200
2 | 300
4 | 50
4 | 100

I want sum of values which having similar id column

means result look like
ID value
==| ====
1 | 300
2 | 300
4 | 150

How to do it with sql query
please give me solution
it was my interview question
Thanx in advance

Posted 22-Oct-12 1:51am

Chandrakant Mane

Updated 22-Oct-12 1:54am

v2

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Stephen Hewison · Accepted Answer · 2012-10-22T01:55:00

Try this

SQL

SELECT
id,
value = sum(value)
FROM [table]
GROUP BY id

What they were testing you on was your understanding of Aggregation in SQL.

The are lots of aggregation methods in SQL. Avg, Sum, Max, Min and more.

You can generally tell if a query has an aggregation in it by the use of the GROUP BY clause. The following is an article which introduces you to this clause.

http://www.w3schools.com/sql/sql_groupby.asp[^]

damodara naidu betha · Accepted Answer · 2012-10-22T19:26:00

Solution 2

Hi ,

try the following code block

SQL

SELECT ID, SUM(value) As Value FROM YourTable GROUP BY ID

Thank you

Posted 22-Oct-12 19:26pm

damodara naidu betha

Comments

Chandrakant Mane 23-Oct-12 10:19am

thanx damodara.

damodara naidu betha 24-Oct-12 2:12am

welcome