Exercise 1: TEXT vs. DateTime — Possible Solution
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WHAT ACTUALLY CHANGES
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In the sibling course, expiry_date is stored as a plain TEXT column —
SQLite has no native date/time type, so the value is just a string that
happens to look like a date. Comparing two expiry dates, or comparing
one against "right now," means comparing those strings character by
character (lexicographically), which only gives the correct answer if
every stored value uses exactly the same, consistently formatted,
zero-padded shape.

In this course, expiryDate is a genuine DateTime field. Prisma's own
query engine understands it as an actual date/time value, not just text
that happens to look like one, and every date comparison made through
Prisma Client's query methods (gte, lte, and the rest) is evaluated as a
real date comparison rather than a raw string comparison.

WHY THIS MATTERS BEYOND THIS CHAPTER
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This exact distinction is what Chapter 6 (Expiry Alerts) builds on
directly. The sibling course has to handle its own TEXT-based date
comparisons carefully to avoid a real correctness gotcha; this course's
own version of the identical feature is built on a field type that
doesn't have that specific failure mode built into how the data is
stored in the first place.

WHY THIS WORKS AS AN ANSWER
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It correctly names the real difference (text comparison vs. a typed date
comparison) rather than describing it as just a cosmetic label change,
and it connects the difference forward to the specific later chapter
where it actually matters, rather than treating it as an isolated fact
about Chapter 2 alone.