Apple practice guide
Stay inside one business context for a few reps in a row while still working from the same live bank used across practice, tracks, and reviews.
Apple
Explore 12 Apple-tagged SQL scenarios focused on query basics, aggregation, filtering.
Context, not signal
Company labels help frame practice in a familiar business context. They are directional study aids, not official interview guidance from the companies listed.
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Questions
12
Estimated prep time
250 min
Progress tracking
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Concept focus
The most common patterns in the current Apple-tagged set.
Query basics
9
Aggregation
6
Filtering
5
Joins
1
Mix at a glance
Use the difficulty and path mix to decide whether you want fundamentals, breadth, or stretch reps.
Suggested rhythm
Start with the easiest scenario in the set, then move upward while tracking accuracy and retry speed. This keeps the context stable while the difficulty rises.
Suggested next scenarios
The next best reps from this company-tagged set based on what you have not solved yet.
Duplicate Job Posts
Practice query basics through a Apple-tagged business scenario.
Signup Confirmation Rate
Practice query basics through a Apple-tagged business scenario.
Creators With Multiple 2024 Posts
Practice query basics through a Apple-tagged business scenario.
Question list
The current Apple-tagged list with learning objectives and your latest status.
Duplicate Job Posts
Apple wants a scorecard for duplicate job posts. Return the number of employers that posted the same role_name in the same city more than once during April 2...
Practice query basics through a Apple-tagged business scenario.
Signup Confirmation Rate
At Apple, analysts are preparing a trend check focused on signup confirmation rate. Calculate the confirmation rate as the percentage of signups that were co...
Practice query basics through a Apple-tagged business scenario.
Creators With Multiple 2024 Posts
Apple wants a reporting cut for creators with multiple 2024 posts. Return each creator_id that posted at least two items in 2024. Sort by creator_id.
Practice query basics through a Apple-tagged business scenario.
Bidirectional Transfer Pairs
Apple wants a readout for bidirectional transfer pairs. Count unique transfer relationships regardless of direction. Return relationship_count.
Practice query basics through a Apple-tagged business scenario.
Frequent Support Callers
Apple wants a diagnostic pass for frequent support callers. Return the distinct policy_holder_id values for members who made at least 3 calls. Sort by policy...
Practice query basics through a Apple-tagged business scenario.
Heavy
At Apple, analysts are preparing a readiness review focused on heavy. Return the distinct policy_holder_id values for members who made at least 3 calls. Sort...
Practice query basics through a Apple-tagged business scenario.
Apple Multimedia Active Users
SELECT COUNT(distinct user_id) as distinct_user_count FROM fct_multimedia_usage WHERE usage_date='2024-07-31'
Practice aggregation through a Apple-tagged business scenario.
April Webinar Share
Apple wants a operations review for april webinar share. Return the percentage of marketing touches that were webinars in April 2024, rounded to the nearest ...
Practice query basics through a Apple-tagged business scenario.
Late Shipment Rate By Carrier
At Apple, analysts are preparing a portfolio scan focused on late shipment rate by carrier. Return the percentage of shipments that arrived late by carrier_n...
Practice query basics through a Apple-tagged business scenario.
19 Apple Pay Volume
SELECT merchant_id, SUM(CASE WHEN LOWER(payment_method) = 'apple pay' THEN transaction_amount ELSE 0 END) AS volume FROM transactions GROUP BY 1 ORDER BY 2 D...
Practice aggregation through a Apple-tagged business scenario.
Top Sellers By Gross Sales
At Apple, analysts are preparing a portfolio scan focused on top sellers by gross sales. Return the top 3 sellers by total_gross_sales. Output seller_id and ...
Practice query basics through a Apple-tagged business scenario.
9. Follow-Up AirPod Percentage
The Apple Customer Retention Data Science team needs your help to investigate buying patterns related to AirPods and iPhones. Write a SQL query to determine ...
Practice aggregation through a Apple-tagged business scenario.