Microsoft SQL training exercises | Subqueries

Showing exercises 1-3 (out of 3)

Category: SQL
Topic: Subqueries
Level: Relatively easy
Course: Introduction to SQL
Exercise: Use a subquery to show events which happened since the last one for a particular country occurred.

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Category: SQL
Topic: Subqueries
Level: Average difficulty
Course: Introduction to SQL
Exercise: Create a correlated subquery to list out all countries having more than 8 events.

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Category: SQL
Topic: Subqueries
Level: Harder than average
Course: Introduction to SQL
Exercise: Use two subqueries to list all events in neither the last 30 countries or the last 15 categories.

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