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Databases and SQL · 30 lessons · up to 10 minutes each
A planned data reliability path through isolation, deadlocks, and safe retries.
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Lessons 1–10
Topic: atomic transaction scope
Draw a small map of atomic transaction scope in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: commit and rollback
Label the main pieces in commit and rollback in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: isolation anomalies
Follow one input through isolation anomalies in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: locks and wait graphs
Write down one practical difference between locks and wait graphs in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: deadlock detection
Mark where deadlock detection in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: optimistic concurrency
Annotate a minimal example of optimistic concurrency in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: retry boundaries
Show how retry boundaries in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: idempotent writes
Describe one likely failure for idempotent writes in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: connection pool behavior
Summarize an official example of connection pool behavior in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: concurrency tests
Match one small use case to concurrency tests in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Lessons 11–20
Topic: atomic transaction scope
Create a small working example that uses atomic transaction scope in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: commit and rollback
Combine commit and rollback in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: isolation anomalies
Set up isolation anomalies in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: locks and wait graphs
Add a check around locks and wait graphs in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: deadlock detection
Add deadlock detection in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: optimistic concurrency
Extract optimistic concurrency in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: retry boundaries
Run sample data through retry boundaries in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: idempotent writes
Capture the result of idempotent writes in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: connection pool behavior
Handle one expected failure from connection pool behavior in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: concurrency tests
Write a short usage note for concurrency tests in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Lessons 21–30
Topic: atomic transaction scope
Add an edge-case test for atomic transaction scope in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: commit and rollback
Add the relevant access, safety, or validation control to commit and rollback in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: isolation anomalies
Record a small baseline for isolation anomalies in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: locks and wait graphs
Change one measurable cost in locks and wait graphs in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: deadlock detection
Use an observable signal to explain a failure in deadlock detection in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: optimistic concurrency
Show that rerunning optimistic concurrency in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: retry boundaries
Compare two documented approaches to retry boundaries in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: idempotent writes
Refine idempotent writes in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: connection pool behavior
Check that a complete small flow using connection pool behavior in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
Topic: concurrency tests
Check the implementation of concurrency tests in the context of transaction isolation, locks, retries, and concurrent writes; save a short example or check that demonstrates the result.
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