Functions in WHERE
You want to know which players from the 2017-2018 NBA season went to college in Louisiana. You ask a friend to make the query for you. It looks like he overcomplicated the WHERE
filter condition by unnecessarily applying string functions and, also, it does not give you precisely what you want because he forgot how to spell Louisiana. You will simplify his query to return exactly what you require.
This exercise is part of the course
Improving Query Performance in SQL Server
Exercise instructions
- Select Run Code to see what your friend's query returns.
- Think about why his query is not giving you exactly what you require then comment out his filter on line 7.
- Add a new wildcard filter condition -
Louisiana%
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
SELECT PlayerName,
Country,
College,
DraftYear,
DraftNumber
FROM Players
WHERE UPPER(LEFT(College,5)) LIKE 'LOU%';
-- Add the new wildcard filter