Does MySQL boolean "tinyint(1)" support up to 127?

Let us understand some key points about TINYINT type in MySQL -

• TINYINT type occupies 1 byte i.e. 8 bits.
• TINYINT(N), where N represents the display width you want.

For example, TINYINT(1) can be used to display a width of 1.

Let us understand 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 that TINYINT (1) does not affect the maximum and minimum values ​​of tinyint.

Let's check it out -

First, create a table with its columns set to TINYINT (1) -

mysql> create table Display
   -> (
   -> rangeOfId tinyint(1)
   -> );
Query OK, 0 rows affected (0.67 sec)

Let's insert a value that is outside the maximum and minimum range . This will result in the 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 values ​​in 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)

Use select statement to display all records in the table. The query is as follows -

mysql> select *from Display;

Output

+-----------+
| rangeOfId |
+-----------+
|       127 |
|      -128 |
+-----------+
2 rows in set (0.00 sec)

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