MySQL：データ型
Required Storage and Range for Integer Types Supported by MySQL
| Type | Storage (Bytes) | Minimum Value Signed | Minimum Value Unsigned | Maximum Value Signed | Maximum Value Unsigned |
|---|---|---|---|---|---|
| TINYINT | 1 | -128 | 0 | 127 | 255 |
| SMALLINT | 2 | -32768 | 0 | 32767 | 65535 |
| MEDIUMINT | 3 | -8388608 | 0 | 8388607 | 16777215 |
| INT | 4 | -2147483648 | 0 | 2147483647 | 4294967295 |
| BIGINT | 8 | -2^{63} | 0 | 2^{63}-1 | 2^{64}-1 |
