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SQL · 25 lessons

06Aggregation and Grouping22m 07Subqueries25m 08Indexes and Performance20m 09Views and CTEs24m 10Transactions20m 17Date and Time Functions22m 19Set Operations25m 21Constraints And Keys25m

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06Prior lessonAggregation and Grouping07 · Subquerieslesson 7 of 25Up nextIndexes and Performance08

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learningsql.orgsql/07 · exerciselesson 7 of 25