how to get average for multiple percentage values in sql

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SQL-Server-2008R2

How to get average for multiple percentage values in sql query

my query results are

94.58
96

and my query is:

SQL

select Sum(Case when (b.test1 <> b.test2
      OR (b.test1 IS NULL AND b.test2 IS NOT NULL)
      OR (b.test1 IS NOT NULL AND b.test2 IS NULL)) then 1 else 0 end) as sample from table b
<pre lang="sql">
      union

select((Sum(a.counterid)*1.0/Sum(a.fieldcount))*100)as sample2 from table2 a

Please help me on this.

Posted 6-Apr-15 23:58pm

SukirtiShetty

Updated 7-Apr-15 0:15am

v5

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Comments

Maciej Los 7-Apr-15 7:03am

Help what? What's input?

2 solutions

Solution 3

Using Common table expressions

SQL

WITH T(I) AS 
(
    select Sum(Case when (b.test1 <> b.test2
          OR (b.test1 IS NULL AND b.test2 IS NOT NULL)
          OR (b.test1 IS NOT NULL AND b.test2 IS NULL)) then 1 else 0 end) as sample from table b
    UNION
    select((Sum(a.counterid)*1.0/Sum(a.fieldcount))*100)as sample2 from table2 a
}
SELECT AVG(I) FROM T

Posted 7-Apr-15 1:19am

Abhinav S

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Magic Wonder · Accepted Answer · 2015-04-07T01:06:00

Solution 2

Hi,

Check this...

SQL

SELECT avg(sample) from
(
select Sum(Case when (b.test1 <> b.test2
      OR (b.test1 IS NULL AND b.test2 IS NOT NULL)
      OR (b.test1 IS NOT NULL AND b.test2 IS NULL)) then 1 else 0 end) as sample from table b
      union
select((Sum(a.counterid)*1.0/Sum(a.fieldcount))*100)as sample2 from table2 a
) x

Hope this will help you.

Cheers

Posted 7-Apr-15 1:06am

Magic Wonder

Comments

SukirtiShetty 8-Apr-15 0:20am

I am getting correct answer but why did you used x in the query. Please explain the query.

Magic Wonder 8-Apr-15 2:39am

Here x is alias/temp name given to the set of tabular format data, from which you can fetch data as per your choice.

SukirtiShetty 8-Apr-15 2:42am

ok thank you.

Magic Wonder 8-Apr-15 3:21am

Your welcome.