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PHP

Pontus Bolmér
Pontus Bolmér
12,471 Points

AVG MYSQL

I have a database and i want to get the avg date of birth from customers, i have following SELECT AVG(personnr) FROM sf_customers

And it returns 198908264610.8651 This is 17 numbers i only want the 12, where does the . and the four last numbers come from?