If you do not specify unsigned, then bigint will be signed. If you specify an unsigned, then bigint will be unsigned.
Let us first create a table −
mysql> create table DemoTable ( Number bigint, // signed Number2 bigint unsigned // unsigned ); Query OK, 0 rows affected (1.08 sec)
Insert records in the table using insert command −
mysql> insert into DemoTable values(18446744073709551615,18446744073709551615); ERROR 1264 (22003): Out of range value for column 'Number' at row 1 mysql> insert into DemoTable values(9223372036854775807,18446744073709551615); Query OK, 1 row affected (0.28 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable;
This will produce the following output −
+---------------------+----------------------+ | Number | Number2 | +---------------------+----------------------+ | 9223372036854775807 | 18446744073709551615 | +---------------------+----------------------+ 1 row in set (0.00 sec)