Cast() Function in SQL Server

The Cast() Function is used to change the data type of a column. We can use the cast() function for various purpose.

Syntax:

Cast(Original_Expression as Desired_DataType)

We can use this function for the following purpose:

1. To concatenate string
2.. Joining two columns
3. Performing Unions of Table
4. Performing mathematical operation on columns

Example: For example we have an employee Table

Now we execute the following query to use Cast() Function.

Select Name, WorkingHours = Cast(WorkingHours as char(2)) + 'hours working a day' 
From Employee

Result:

The Convert() Function is used to convert a date/time value in different different formats. Click here to learn more