how to select a particular value from multiple rows

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Hi guys,

I have a master table and detail table.Corresponding to an ID in master i will have 2/more rows in detail table. Based on the ID of detail i have values in another table say table3. That means if i have 2 rows in detail i will have 2 rows in table3. There is a field licensecount in table 3 and both rows wil have same values for that column. I need to find count of that licensecount based on the id in the mastertable.

The problem is when i join these table and take SUM(table3.licensecount) i ger the duplicate values added as result. For ex: if the licensecount is 20 what i get is 40 where i should be getting is 20..

Can anyone pls help me out. Thanks in advance

Posted 12-Oct-12 2:11am

Arjun Menon U.K

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damodara naidu betha 12-Oct-12 9:40am

do u need COUNT(licensecount) or SUM(licensecount)?

2 solutions

Solution 1

you have not provide some table data & sql-Query.

try distinct
or
check type of join & conditions applied for join.

Happy Coding!
:)

Posted 12-Oct-12 2:18am

Aarti Meswania

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Arjun Menon U.K 12-Oct-12 8:31am

Sorry Aarti i dont have any data my friend just texted this and i couldn't find a solution

Aarti Meswania 12-Oct-12 8:34am

it's ok.
then suggest this to solve query

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MT_ · Accepted Answer · 2012-10-12T02:22:00

Solution 2

There is very less data provided and question is little vague.

But try as shown below by replaceing proper foreign keys.

SQL

select count(licensecount) from
table1,table2,table3
where
table2.sameid= table3.sameid
and table2.id = table1.id

Thanks
Milind

Posted 12-Oct-12 2:22am

MT_