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Senior Database Developer | SQL | Fill sparse table

Contains following tasks:

1) Choice questions - assessing knowledge of SQL

2) Task [level: Hard] - SQL | Fill sparse table - Write a query that will return the list of all users with the creation date and return the date from the previous not-null row for the entries affected with the bug.

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Tasks details:

SQL exercise

senior level
Skills: SQL

SQL | Fill sparse table

Choice questions

senior level
Skills: SQL

5 choice questions