How do I join these two tables on ServiceContract and LogicalAdress? When I try LEFT JOIN I end up with way more rows than there initially are.
https://www.db-fiddle.com/f/a8ZiSmfx8iTMe4kwEtfSsb/1
I’ve tried the query below but it gives me "Query Error: Error: ER_BAD_FIELD_ERROR: Unknown column ‘ServiceContract’ in ‘from clause’".
SELECT *
FROM `ServiceErrorsProd`
JOIN `ServiceProductions` USING (ServiceContract, LogicalAdress)
>Solution :
The error reported by that query is actually:
Query Error: Error: ER_BAD_FIELD_ERROR: Unknown column ‘a.LogicalAdress’ in ‘on clause’
This line:
`LogicalAdress ` varchar(53) DEFAULT NULL,
^ extra space
Should be:
`LogicalAdress` varchar(53) DEFAULT NULL,
Delimited identifiers allows you to have identifiers with characters normally not allowed, including whitespace.