While creating a MySQL table use the reserved keyword ‘Key’

To use the reserved keyword ‘Key’, use the concept of the backtick symbol. Here, for our example, I am using the column name key which needs a backtick symbol around the column name.

Let us first create a table −

mysql> create table DemoTable
(
   `Key` int
);
Query OK, 0 rows affected (0.67 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(100);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values(101);
Query OK, 1 row affected (0.55 sec)
mysql> insert into DemoTable values(110);
Query OK, 1 row affected (0.28 sec)
mysql> insert into DemoTable values(120);
Query OK, 1 row affected (0.09 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+------+
| Key  |
+------+
| 100  |
| 101  |
| 110  |
| 120  |
+------+
4 rows in set (0.00 sec)