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SQL

Full Stack Developer

SQL questions

9 questions on SQL for full stack developers, easiest first.

Easy 4

Preventing SQL injectioneasy
Listing users with zero orderseasy
Comparing a column to NULLeasy
What an index costseasy

Medium 2

Moving credits between accountsmedium
Composite index column ordermedium

Hard 3

Two agents edit one tickethard
Items missing between pageshard
NOT IN returns no rowshard

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