How to display a customized field which is based on formulas of other fields in SQL server 2012?

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SQL-Server-2012

Hi All
This post may seem repetitive to one of my previous questions.But I thought to post freshly. Following is the query:-

SQL

SELECT
    JOB_NAME,
    SUM(CASE Status WHEN 'Failure' THEN 1 ELSE 0 END) As Fail_Count,
    COUNT(JOB_NAME) As OverallCount
FROM
    COMP_HIS_TBL
GROUP BY
    JOB_NAME

I need to add an additional field called "FailPercent" based on the formula :(Fail_Count/Overall_Count)*100 in the result.

What I have tried:

I tried the following queries but its throwing error:(

SQL

SELECT
    JOB_NAME,
    SUM(CASE Status WHEN 'Failure' THEN 1 ELSE 0 END) As Fail_Count,
    COUNT(JOB_NAME) As OverallCount,
	(Fail_Count/OverallCount)*100 as Fail_Percent
FROM
    COMP_HIS_TBL
GROUP BY
    JOB_NAME)

2)

SQL

Select JOB_NAME,T1.Fail_Percent  from
(SELECT
    JOB_NAME,
    SUM(CASE Status WHEN 'Failure' THEN 1 ELSE 0 END) As Fail_Count,
    COUNT(JOB_NAME) As OverallCount,
	(Fail_Count/OverallCount)*100 as Fail_Percent
FROM
    COMP_HIS_TBL
GROUP BY
    JOB_NAME)as T1

3)

SQL

Select JOB_NAME,(Count(Fail_Count)/Count(OverallCount))*100 as Fail_percent,STATUS from COMP_HIS_TBL 
where Fail_Count,OverallCount in (SELECT
JOB_NAME,
SUM(CASE Status WHEN 'Failure' THEN 1 ELSE 0 END) As Fail_Count,
COUNT(JOB_NAME) As OverallCount
FROM
COMP_HIS_TBL
GROUP BY
JOB_NAME)

Please provide a solution to this:(
Thank you

Posted 9-May-16 19:13pm

mousau

Updated 10-May-16 3:11am

v5

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Comments

ZurdoDev 10-May-16 9:03am

What's the error?

mousau 10-May-16 9:11am

Hi Ryan
For the 1st query the error is :-
Msg 102, Level 15, State 1, Line 9
Incorrect syntax near ')'

2nd query:-

Msg 207, Level 16, State 1, Line 7
Invalid column name 'Fail_Count'.
Msg 207, Level 16, State 1, Line 7
Invalid column name 'OverallCount'.

3rd Query:-
Msg 4145, Level 15, State 1, Line 2
An expression of non-boolean type specified in a context where a condition is expected, near ','.

ZurdoDev 10-May-16 9:18am

So, stick with what you think is right and fix the syntax errors.

mousau 10-May-16 9:32am

Hi Ryan
Thanks for your time

1 solution

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CHill60 · Accepted Answer · 2016-05-10T03:11:00

You need to read up on SQL's Windows Functions - How to Use Microsoft SQL Server 2012's Window Functions, Part 1 | SQL Server 2012 content from SQL Server Pro[^]

Try this query to see if it meets your requirements:

SQL

SELECT
    JOB_NAME, [Status],
    COUNT(*) OVER (PARTITION BY [Status]) As Fail_Count,
    COUNT(JOB_NAME) OVER() As OverallCount,
    100.0 * COUNT(*) OVER (PARTITION BY [Status]) / COUNT(JOB_NAME) OVER() as FailPercent

FROM
    COMP_HIS_TBL

If you just want to look at the failures then use it as a sub-query

SQL

SELECT * FROM
(
	SELECT
		JOB_NAME, [Status],
		COUNT(*) OVER (PARTITION BY [Status]) As Fail_Count,
		COUNT(JOB_NAME) OVER() As OverallCount,
		100.0 * COUNT(*) OVER (PARTITION BY [Status]) / COUNT(JOB_NAME) OVER() as FailPercent

	FROM
		COMP_HIS_TBL
) src
WHERE [Status] = 'Failure'