Fix Error in MySQL syntax while creating a table column with name “index”?

You can’t use the index as a column name because it is a reserved word. For this, you need to use backticks around the column name.

If you will use a reserved word as the column name, you can see the following error−

mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> index int    -> )ENGINE=MyISAM; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'int )ENGINE=MyISAM' at line 4

Let us first create a table. Here, we are using a reserved word index as the column name, but enclosing it with backticks won’t give an error−

mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> `index` int    -> )ENGINE=MyISAM; Query OK, 0 rows affected (0.28 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(`index`) values(4); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(`index`) values(8); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable(`index`) values(12); Query OK, 1 row affected (0.06 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+----+-------+ | Id | index | +----+-------+ |  1 |     4 | |  2 |     8 | |  3 |    12 | +----+-------+ 3 rows in set (0.00 sec)