guys, i got an error while saving or updating bank account number.
first, everything is ocay when i set my account into bigint (16) data type.
but, i changed it into varchar(16)
however,when i try to change it back to bigint suddenly the account number that i save before this became 2147483647 while what i want is 8988584864668848.
so, what data type is actually the most suitable for my account number ?
the same thing occur when i updating my data for identification card number (12)