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Why can't we use column name “desc” in MySQL?
The desc is a MySQL reserved word, therefore you cannot use it. But, if you still want to set the column name as ‘desc’, you need to use backticks. The backtick notation is (` `).
To understand the above concept, let us create a table.
The query to create a table is as follows −
mysql> create table useOfDescColumnNameDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20), -> `desc` varchar(200) default 'GOOD' -> ); Query OK, 0 rows affected (0.60 sec)
Insert some records in the table using insert command.
The query is as follows −
mysql> insert into useOfDescColumnNameDemo(Name) values('John');
Query OK, 1 row affected (0.17 sec)
mysql> insert into useOfDescColumnNameDemo(Name) values('Bob');
Query OK, 1 row affected (0.16 sec)
mysql> insert into useOfDescColumnNameDemo(Name) values('Carol');
Query OK, 1 row affected (0.13 sec)
mysql> insert into useOfDescColumnNameDemo(Name) values('Sam');
Query OK, 1 row affected (0.13 sec)Display all records from the table using a select statement.
The query is as follows −
mysql> select *from useOfDescColumnNameDemo;
Here is the output −
+----+-------+------+ | Id | Name | desc | +----+-------+------+ | 1 | John | GOOD | | 2 | Bob | GOOD | | 3 | Carol | GOOD | | 4 | Sam | GOOD | +----+-------+------+ 4 rows in set (0.00 sec)
Here is the query to use backticks with a select statement −
mysql> select `desc` from useOfDescColumnNameDemo;
The following is The output −
+------+ | desc | +------+ | GOOD | | GOOD | | GOOD | | GOOD | +------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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