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I have a very simple rating system in my database where each rating is stored as an enum(‘1′,’-1′). To calculate the total I tried using this statement:
SELECT SUM(CONVERT(rating, SIGNED)) as value from table WHERE _id = 1
This works fine for the positive 1 but for some reason the -1 are parsed out to 2’s.
Can anyone help or offer incite?
Or should I give up and just change the column to a SIGNED INT(1)?
Yes, I’d suggest to change the type of the column. The issue becomes clear when you read the doc about enum type (which strongly recommends not to use numbers as enumeration values!) – the index of the enum item is returned, not the enum value itself.