MySQL Alias

MySQL Alias keyword is used to temporarily rename the column names, or table names within a Database. Sometimes column names may not be user-friendly in real-time. For example we store First Name as either FirstName or First_Name. When user reads the data it will be annoying to see the column heading like that. So, while we SELECT the data, we use this Alias to rename them as ‘First Name’ or ‘FIRST NAME’.

MySQL Alias Syntax

The basic syntax to write MySQL Table Alias Names is as shown below:

And the syntax to write MySQL Column Alias Names is as shown below:

TIP: In MySQL Server Alias, AS Keyword is optional. It is up to you to include it or not.

We are going to use the below shown data to explain the ALIAS Names in MySQL with example.

MySQL Alias Example 1

In this example we are going to rename one column name to make it more meaningful. For this, we are going to rename Name to ‘Country Name’

OUTPUT

MySQL Alias Example 2

In this example, we are using the CONCAT string function to combine the Name, and region, and assigned alias name as Country Name.

OUTPUT

MySQL Alias Example 3

In MySQL, we can also apply the Alias names to calculated columns. In this example we will show you, How to apply Alias names to calculated columns

We subtracted the Independent Year from 2017, and also added 15000 to each and every record of the Population column and renamed them as No of Years, and New Population.

OUTPUT

MySQL Alias – Command Prompt Example

In this example we will write a query in Command prompt to demonstrate the Alias Columns along with the Where clause.

OUTPUT

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