Question

Currently I’m manually creating a string where I concatenate all the values in each row in my table. I’m hashing this string for each row to get a hash value for the current values (/status) of the row, which I’m later is using to determine if the row has changed.

Instead of doing this manually, is there an build-in way i mySQL to get a unique hash value for each row?

Answer 1

you could do something like

SELECT MD5(concat(field1, field2, field3, ...)) AS rowhash

but you can’t get away from listing which fields you want, as concat(*) is not an option (syntax error).