Dynamically Uncollapse Columns for Tabular Output

jlazerus

Hi,

I'm trying to create a stored procedure like in the link below and while its not erroring out, its also not uncollapsing columns like it says it would. I'm not great at SQL and I've tried this in ETL but I can't get it to work there either.

 

https://knowledge.domo.com/@api/deki/files/5209/Dynamic_Pivot.sql?revision=1

 

What I'm trying to do is to take a dataset that looks like this and have 2 different types of cards (a multi-line chart with the EBProjectHealth as the series and a table that looks like what's below)

 

Input:

 

Output 1:

One row for each ProjectName

 

Output 2: 

Count of Distinct ProjectName for each month, by EBProjectHealth (as scope)

 

When I run the stored procedure, it gives me an output that looks like the original input above with back ticks surrounding the date field. I also tried it on the ProjectName field with the same result.

 

Thoughts?

ST_-Superman-_

I see why.

 

Your Date field is Text format, not a date.  Can you convert it to a Date earlier in the data flow?  then this should work.

ST_-Superman-_

Try creating these two transorms in your data flow:

number 1:

 

CREATE PROCEDURE pivot()
BEGIN
set @sql_dynamic = (
SELECT
group_concat( DISTINCT
concat(
'max(case when month(Date)='
,month(`Date`)
,' and year(Date)='
,year(`Date`)
,' then EBProjectHealth end) as `'
,monthname(`Date`)
,' '
,year(`Date`)
,'`'
)
) as `test`
FROM `dojo_help_jlazerus`);

SET @sql = concat('create table pivot as ','Select ProjectName, ',
@sql_dynamic, '
FROM dojo_help_jlazerus
Group by ProjectName WITH ROLLUP'
);

PREPARE stmt from @sql;
EXECUTE stmt ;
DEALLOCATE PREPARE stmt;

END

 

 

 

number 2:

CALL pivot()

 

 

this will create a table named pivot that will pivot all of your months.

jlazerus

Thanks for the reply. When I run this, I get this error on running the Call pivot()

 

The database reported a syntax error. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NULL' at line 1

ST_-Superman-_

Did I get the field names correct?

 

I used "ProjectName", "Date", and "EBProjectHealth"

jlazerus

Yes. Those look correct.

ST_-Superman-_

That's odd.  It works for me.  Does it error out when you run the Create procedure transform too?

jlazerus

It does not error when I create the procedure.

ST_-Superman-_

Maybe I posted an old version of the code.  Try copying this in again?

 

CREATE PROCEDURE pivot()
BEGIN
set @sql_dynamic = (
SELECT
group_concat( DISTINCT
concat(
'max(case when month(Date)='
,month(`Date`)
,' and year(Date)='
,year(`Date`)
,' then EBProjectHealth end) as `'
,monthname(`Date`)
,' '
,year(`Date`)
,'`'
)
) as `test`
FROM `dojo_help_jlazerus`);

SET @sql = concat('create table pivot as ','Select ProjectName, ',
@sql_dynamic, '
FROM dojo_help_jlazerus
Group by ProjectName WITH ROLLUP'
);

PREPARE stmt from @sql;
EXECUTE stmt ;
DEALLOCATE PREPARE stmt;

END

jlazerus

Same error. And just to validate, the only thing I'm changing on your script is the FROM table in the SELECT and SET sections, right?

ST_-Superman-_

ST_-Superman-_

Actually, you can probably drop the "WITH ROLLUP" text as well

jlazerus

Those are the fields i'm changing and I also tried without the WITH ROLLUP text and am getting the same error.

jlazerus

Good catch. That fixed that error. This is amazing! Thank you so much.