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feat: adds Kerry Ferguson's Lesson 25 SQL Queries #794

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feat: adds Kerry Ferguson's Lesson 25 SQL Queries #794

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6a3130c
adds kerryferguson sql file with queries
KerryFerguson04 Oct 9, 2025
39116c5
fixedqueries, should be working now
KerryFerguson04 Oct 9, 2025
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13 changes: 13 additions & 0 deletions lesson_25/db/db_app/src/main/resources/queries/kerryferguson.sql
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Original file line number Diff line number Diff line change
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SELECT type, COUNT(*) as count
FROM media_items
GROUP BY type;

SELECT SUM(pages)
FROM media_items
JOIN checked_out_items ON media_items.id = checked_out_items.item_id;

SELECT guests.name, guests.email, media_items.title
FROM guests
LEFT JOIN checked_out_items ON guests.email = checked_out_items.email
LEFT JOIN media_items ON checked_out_items.item_id = media_items.id;