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


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


cast1 The Convert() Function is used to convert a date/time value in different different formats. Click here to learn more

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