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25 Problems

SQL Sheet

Learn SQL through practical data science queries. From SELECT basics to window functions and CTEs used in real ML data pipelines.

10 Easy13 Medium2 Hard

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5 sections
Basic SELECTWHERE ClausesORDER BYLIMIT and OFFSETDISTINCT ValuesSELECT Fundamentals Quiz10 questions
INNER JOINLEFT JOINSelf JoinMultiple JoinsCross JoinJoins & Relationships Quiz10 questions
GROUP BYHAVING ClauseCOUNT, SUM, AVGConditional AggregationNested AggregationsAggregation Quiz10 questions
ROW_NUMBERRANK and DENSE_RANKRunning TotalsNULL HandlingLAG and LEADWindow Functions Quiz10 questions
SubqueriesCommon Table ExpressionsCASE StatementsDate FunctionsString FunctionsAdvanced Queries Quiz10 questions