FreePremium122 ProblemsSQL
SQL JOIN Practice with Built-In Visualizer
Strengthen your SQL JOIN skills with problems covering INNER JOIN, LEFT JOIN, RIGHT JOIN, CROSS JOIN, self-joins, and multi-table joins. The built-in SQL Visualizer highlights exactly which rows match on each join condition, making it easy to spot missing or duplicate matches.
122
SQL Problems
Difficulty Breakdown
122 problems22 Easy(18%)
82 Medium(67%)
18 Hard(15%)
0 Expert(0%)
Skills You'll Practice
71 skillsadtechaggregationanti joinatmbankingboolean logiccase statementcleaning transformco purchasecoalescecomputed columncount distinctcross sellctedata warehousedate arithmeticdate timederived tabledistinctdistinct pairsexistsfilteringfintechfive table joinfood deliveryfour tablefour table joingroup byhealthcarein operatorinner joinis nulljoinsjuliandayleft joinloan paymentslodginglogisticsmobilitymulti column sortmulti tablenot existsnull checknull handlingnullable fknumeric thresholdorder bypaymentsreal estaterecommendationretailreturning customersroundsaassecurityself joinsocialsortingstreamingstring concatstring concatenationsubquerysubstrtelecomthree tablethree table jointie breakerstwo tabletwo table joinwherewindow fns
All Problems122 total
Explore more topics
Practice with 1,500+ problems across SQL and Python — window functions, joins, pandas, and more.
All company names, logos, and trademarks are the property of their respective owners.
Their use is for identification purposes only and does not imply endorsement.