MySQL SELECT To Add A New Column To A Query And Give It A Value?

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MySQL SELECT to add a new column to a query and give it a value? MySQLMySQLi Database

To add column to MySQL query and give it a value, use the below syntax −

select yourColumnName1,yourColumnName2,.....N ,yourValue AS anyAliasName from yourTableName;

Let us first create a table −

mysql> create table DemoTable (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(20) ); Query OK, 0 rows affected (0.84 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(FirstName) values('John'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(FirstName) values('Larry'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(FirstName) values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(FirstName) values('Robert'); Query OK, 1 row affected (0.15 sec)

Following is the query to display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | John | | 2 | Larry | | 3 | Chris | | 4 | Robert | +----+-----------+ 4 rows in set (0.00 sec)

Following is the query to add column to MySQL and give it a value. Here we have set the value 23 after creating a new column AGE −

mysql> select Id,FirstName,23 AS AGE from DemoTable;

This will produce the following output −

+----+-----------+-----+ | Id | FirstName | AGE | +----+-----------+-----+ | 1 | John | 23 | | 2 | Larry | 23 | | 3 | Chris | 23 | | 4 | Robert | 23 | +----+-----------+-----+ 4 rows in set (0.00 sec) Ankith Reddy Updated on: 2019-07-30T22:30:25+05:30

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