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What is the smallest datatype for one bit in MySQL?
The smallest datatype for one bit can be bit(1). The syntax is as follows −
yourColumnName bit(1)
To understand the above syntax, let us create a table. The query to create a table is as follows −
mysql> create table bitDemo -> ( -> isValid bit(1) -> ); Query OK, 0 rows affected (0.49 sec)
Now you can check all the details of table with the help of SHOW CREATE command. The query is as follows −
mysql> show create table bitDemo;
Here is the output −
+---------+-----------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +---------+-----------------------------------------------------------------------------------------------------------------------------+ | bitDemo | CREATE TABLE `bitdemo` (`isValid` bit(1) DEFAULT NULL) ENGINE =InnoDB DEFAULT CHARSET =utf8mb4 COLLATE =utf8mb4_0900_ai_ci | +---------+-----------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
Insert some records in the table using insert command. The query is as follows −
mysql> insert into bitDemo values(0); Query OK, 1 row affected (0.13 sec) mysql> insert into bitDemo values(1); Query OK, 1 row affected (0.10 sec) mysql> insert into bitDemo values(1); Query OK, 1 row affected (0.07 sec) mysql> insert into bitDemo values(0); Query OK, 1 row affected (0.14 sec)
Display all records from the table using select statement. The query is as follows −
mysql> select *from bitDemo;
Here is the output −
+---------+ | isValid | +---------+ | | | | | | | | +---------+ 4 rows in set (0.00 sec)
To show the bit value, use the following query −
mysql> select isValid+0 from bitDemo;
The following is the output −
+-----------+ | isValid+0 | +-----------+ | 0 | | 1 | | 1 | | 0 | +-----------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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