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Reliable and Fast SQL
Pause here and make sure the main ideas feel clear before moving to the next chapter.
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What you should understand now
Protect multi-step changes and understand how databases find data efficiently.
Transactions and constraints
Keep related writes valid as one unit.
Indexes and query plans
Understand the trade-off behind faster lookup.
Safe application queries
Keep untrusted values separate from SQL syntax.
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Before you move on
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