[Koha] Problem with some SQL

[Sebastian Krieg]

Hello,

Try this to combine the query and exp2 and exp3:

SELECT []
	FROM []
	WHERE
	exp1 
	AND
	(exp2 OR exp3)
	ORDER by []
;

I hope this works, I got no error executing this query in my database...

Thanks

Sebastian


> Carlos Lopez <clopez at dml.vic.edu.au> hat am 15.03.2021 06:33 geschrieben:
> 
>  
> Hi everyone
> 
> I have the following reports that I would like to combine into one:
> 
> SELECT categories.description, COUNT(borrowers.borrowernumber)
> FROM borrowers, categories
> WHERE borrowers.categorycode = categories.categorycode
> AND borrowers.date_renewed BETWEEN <<Expiry date BETWEEN (yyyy-mm-dd)|date>> AND <<and (yyyy-mm-dd)|date>>
> GROUP BY borrowers.categorycode
> 
> (count the number of borrower renewals between 2 given dates and provide a breakdown by borrower category)
> 
> And
> 
> SELECT categories.description, COUNT(borrowers.borrowernumber)
> FROM borrowers, categories
> WHERE borrowers.categorycode = categories.categorycode
> AND borrowers.dateenrolled BETWEEN <<Expiry date BETWEEN (yyyy-mm-dd)|date>> AND <<and (yyyy-mm-dd)|date>>
> GROUP BY borrowers.categorycode
> 
> (same thing but for new enrolments rather than renewals)
> 
> What I would like is a report that will give me 3 columns: Borrower category (from categories.description), a count of newly-enrolled borrowers, and a count of renewed borrowers, with a breakdown by borrower category, but I only want the user to have to enter a single starting date and a single end date (not 2 identical date ranges).
> 
> I tried to run this one but it looks as though we're not allowed to set variables before the SELECT statement:
> 
> SET @start_date = <<Start of date range (yyyy-mm-dd)|date>>
> SET @end_date = <<End of rate range (yyyy-mm-dd)|date>>
> SELECT categories.description AS "BORROWER CATEGORY",
> SUM(CASE WHEN borrowers.dateenrolled BETWEEN @start_date AND @end_date THEN 1 ELSE 0) NewBorrowers,
> SUM(CASE WHEN borrowers.date_renewed BETWEEN @start_date AND @end_date THEN 1 ELSE 0) RenewedBorrowers
> FROM borrowers, categories
> WHERE borrowers.categorycode = categories.categorycode
> GROUP BY borrowers.categorycode
> 
> Is something like what I'm trying to do even possible on Koha, or should I be happy with my 2 reports?
> 
> With kind regards from the Dalton McCaughey Library Team
> 
> Carlos Lopez
> 
> Dalton McCaughey Library | 29 College Crescent, Parkville, VICTORIA 3052
> Ph: 03 9340 8888 ext.1 | library at dml.vic.edu.au<mailto:library at dml.vic.edu.au> | library.dmlibrary.org.au
> 
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___ 
mailto:sebastian.krieg at tuz-eisenach.de