SQL Analyst · CTE · ROW_NUMBER
Keep the two best lines per region — customer collections · training scenario
Keep the two best lines per region from a customer collections dataset designed to control the level of detail and discrepancies. You must produce the result, check it on the source data and explain what it allows you to decide in this customer collections.
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Keep the two best lines per region — customer collections · training scenario is part of the complete programme: 38 lessons, 62 verifiable exercises and 8 published guided projects.
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