In this lab, you will practice writing SQL SELECT
queries that limit results based on conditions, using WHERE
, ORDER BY
, and LIMIT
.
You will practice the following:
- Order the results of your queries by using
ORDER BY
(ASC
&DESC
) - Limit the number of records returned by a query using
LIMIT
- Write SQL queries to filter and order results
Here's a database full of famous dogs! The dogs
table is populated with the following data:
name | age | gender | breed | temperament | hungry |
---|---|---|---|---|---|
Snoopy | 3 | M | beagle | friendly | 1 |
McGruff | 10 | M | bloodhound | aware | 0 |
Scooby | 6 | M | great dane | hungry | 1 |
Little Ann | 5 | F | coonhound | loyal | 0 |
Pickles | 13 | F | black lab | mischievous | 1 |
Clifford | 4 | M | big red | smiley | 1 |
Lassie | 7 | F | collie | loving | 1 |
Snowy | 8 | F | fox terrier | adventurous | 0 |
NULL | 4 | M | golden retriever | playful | 1 |
In the cell below, import pandas
and sqlite3
. Then establish a connection to the database dogs.db
.
Look at all of the data in the table by selecting all columns from the dogs
table with pd.read_sql
.
# Your code here; imports, create a connection, select all
Display the outputs for each of the following query descriptions.
# Your code here
# Your code here
# Your code here
Select the names of all dogs listed in alphabetical order. Notice that SQL lists the nameless dog first.
# Your code here
# Your code here
# Your code here
# Your code here
Select the name and breed of the dogs who are between five and ten years old, ordered from oldest to youngest
# Your code here
Select the name, age, and hungry columns for hungry dogs between the ages of two and seven. This query should also list these dogs in alphabetical order.
# Your code here
# Your code here
Great work! In this lab you practiced writing more complex SQL statements to not only query specific information but also define the quantity and order of your results.