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I'm trying to get all the wins per team, however, SQL decides to throw an error
The following query is being executed:
SELECT `t`.`teamcode`, COUNT(*) AS `gewonnen`
FROM `Team` `t`
INNER JOIN `Wedstrijd` `w` ON `w`.`teamthuis` = `t`.`teamcode`
GROUP BY `w`.`teamthuis`
HAVING `w`.`scorethuis` > `w`.`scoreuit`
#1054 - Unknown column 'w.scorethuis' in 'having clause'
Without aliases:
SELECT `Team`.`teamcode`, COUNT(*) AS `gewonnen`
FROM `Team`
INNER JOIN `Wedstrijd` ON `Wedstrijd`.`teamthuis` = `Team`.`teamcode`
GROUP BY `Wedstrijd`.`teamthuis`
HAVING `Wedstrijd`.`scorethuis` > `Wedstrijd`.`scoreuit`
#1054 - Unknown column 'Wedstrijd.scorethuis' in 'having clause'
522
Having can be used without groupby clause,in aggregate function,in that case it behaves like where clause. groupby can be used without having clause with the select statement. 3. The having clause can contain aggregate functions.
The MySQL unknown column in field list error happens when you put a column name in your SQL script that can't be found by MySQL.
A HAVING clause is like a WHERE clause, but applies only to groups as a whole (that is, to the rows in the result set representing groups), whereas the WHERE clause applies to individual rows. A query can contain both a WHERE clause and a HAVING clause.
There is no need to use HAVING. Try WHERE instead:
SELECT `t`.`teamcode`, COUNT(*) AS `gewonnen`
FROM `Team` `t`
INNER JOIN `Wedstrijd` `w` ON `w`.`teamthuis` = `t`.`teamcode`
WHERE `w`.`scorethuis` > `w`.`scoreuit`
GROUP BY `w`.`teamthuis`
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