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What does parenthesis mean in MySQL SELECT (COLNAME)?
The SELECT(COLNAME) means, we are creating an alias for that column. Let us see an example and create a table −
mysql> create table DemoTable865( FirstName varchar(100), LastName varchar(100) ); Query OK, 0 rows affected (0.77 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable865 values('Chris','Brown');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable865 values('Adam','Smith');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable865 values('David','Miller');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable865 values('Carol','Taylor');
Query OK, 1 row affected (0.15 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable865;
This will produce the following output −
+-----------+----------+ | FirstName | LastName | +-----------+----------+ | Chris | Brown | | Adam | Smith | | David | Miller | | Carol | Taylor | +-----------+----------+ 4 rows in set (0.00 sec)
Here, we are creating an alias for the column with SELECT (COLNAME) MySQL −
mysql> select (FirstName) StudentFirstName,(LastName) StudentLastName from DemoTable865;
This will produce the following output −
+------------------+-----------------+ | StudentFirstName | StudentLastName | +------------------+-----------------+ | Chris | Brown | | Adam | Smith | | David | Miller | | Carol | Taylor | +------------------+-----------------+ 4 rows in set (0.00 sec)
Updated on: 2019-09-03T13:02:08+05:30
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