SQL Joins & Subqueries

0 / 9 solved

Question Tags Difficulty Success

1. SQL Self Join

Basics

Medium 68%

2. Outer Join Equivalence

Basics

Medium 67%

3. Where Turns It Inner

outer-joinsnull-semantics +1

Medium —

4. Rewriting The Scalar Subquery

correlated-subqueryouter-joins +1

Medium —

5. SQL Correlated Subquery

Basics

Medium 80%

6. Projection After Join Size

Basics

Medium 68%

7. Nobody Comes Back

not-innull-semantics +1

Medium —

8. The Shipping Doubled

join-fan-outaggregates +1

Medium —

9. Ten Rows Versus Hundred

query-planshash-join +1

Hard —

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