When I run the following query in query editor I get this error.
Unknown error parsing query
SELECT Id, OwnerId,Account.OwnerId FROM Contact where OwnerId = Account.OwnerId limit 100
Does anybody know what the problem is?
You can't compare a field to another field in
SOQL. Take a look at the documentation on fieldExpression Syntax (emphasis mine):
fieldName comparisonOperator value
value: A value used to compare with the value in fieldName. You must supply a value whose data type matches the field type of the specified field. You must supply a native value—other field names or calculations are not permitted. If quotes are required (for example, they are not for dates and numbers), use single quotes. Double quotes result in an error.
A common workaround is to create a checkbox formula to the same effect. Then just check if it's true in your query.