TrySQL · CSE132A Level 2

Formal Query Practice

Harder SQL / RA drills with a code box, schema context, and exam-style feedback.

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Code Medium

Bank Schema

customer(name: text, credit: integer)
loan(no: string, type: text,
     minCredit: integer, amount: integer)
borrower(cname: text, lno: text, due: date)

Keys / FK

customer.name primary key
loan.no primary key
borrower.cname → customer.name
borrower.lno → loan.no

RA Tools

σ selection π projection ⋈ join ρ rename ∪ union − difference γ aggregation τ sort