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Does MySQL Boolean “tinyint(1)” holds values up to 127?
Let us learn some points about TINYINT type in MySQL −
- The TINYINT type takes 1 byte i.e. 8 bits.
- The TINYINT(N), where N indicates the display width you want.
For example, TINYINT(1) can be used to display width which is 1.
Let us learn about the minimum and maximum values −
The maximum value for tinyint is= (2(8-1)-1) = 127 The minimum value for tinyint is = -(2(8-1)) = -128.
The value will be between -128 to 127. This means TINYINT (1) does not affect the maximum and minimum value of tinyint.
Let us check it −
Firstly, create a table with a column set as TINYINT (1) −
mysql> create table Display -> ( -> rangeOfId tinyint(1) -> ); Query OK, 0 rows affected (0.67 sec)
Let us insert a value beyond the maximum and minimum range. This will result in an error −
mysql> insert into Display values(128); ERROR 1264 (22003): Out of range value for column 'rangeOfId' at row 1
The query to insert records is as follows. We will now insert the values within the range −
mysql> insert into Display values(127); Query OK, 1 row affected (0.18 sec) mysql> insert into Display values(-128); Query OK, 1 row affected (0.20 sec)
Display all records from the table using select statement. The query is as follows −
mysql> select *from Display;
Output
+-----------+ | rangeOfId | +-----------+ | 127 | | -128 | +-----------+ 2 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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