Practice
Problems to sharpen your skills before a test or an interview. Try as often as you like: nothing here is seen by employers.
Solved 0 of 62
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| Problem | Area | Kind | Difficulty | Your progress |
|---|---|---|---|---|
| WHERE vs HAVING | SQL | Multiple choice | easy | Not tried |
| Index use | SQL | Multiple choice | medium | Not tried |
| LEFT JOIN | SQL | Multiple choice | medium | Not tried |
| Transaction isolation | SQL | Multiple choice | hard | Not tried |