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9.3

db2 table self-join with count by column

Asked by richard_crist in DB2 Database, SQL Query Syntax

Tags: db2, sql, count

I have a table similar to the following (column headings at top):

appnum, state, yn1, yn2, yn3, yn4
1, AL, Y, N, Y, N
2, AL, N, Y, Y, Y
3, AL, N, N, N, N
4, OK, Y, Y, Y, Y
5, PA, N, Y, N, Y

I am looking for a count by:

state, yn1, yn2, yn3, yn4

where the count is how many yn1 values = 'Y', yn2 values = 'Y', etc.

For the example above the output would look like (with headings at top):

state, yn1count, yn2count, yn3count, yn4count
AL, 1, 1, 2, 1
OK, 1, 1, 1, 1
PA, 0, 1, 0, 1

I hope my description is clear.  Thank you for any help!
[+][-]08/27/09 05:06 AM, ID: 25196967Accepted Solution

Your question has an Asker Certified™ answer! richard_crist verified that this solution worked for them--which means it will likely work for you, too. Click to view the solution free for 30-days now.

About this solution

Zones: DB2 Database, SQL Query Syntax
Tags: db2, sql, count
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Solution Provided By: Kdo
Participating Experts: 1
Solution Grade: A
 
 
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