Extracting a substring
In this exercise, you will extract parts of a string. You will work with data from the voters table.
There is a built-in function that can help you with this task. The parameters required by this function are:
- the expression from which the substring is extracted;
- the starting position of the substring
- and its length.
Keep in mind that the position of the first character in a string is 1, not 0. This will help you to correctly calculate the starting position of the substring.
Deze oefening maakt deel uit van de cursus
Functions for Manipulating Data in SQL Server
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
SELECT
email,
-- Extract 5 characters from email, starting at position 3
___ AS some_letters
FROM voters;