LEFT JOIN & NULLs: IFNA, 'Unknown' and Unmatched Rows
This lesson is part of the course
In this lesson
You keep every November order of Harbor & Pine Coffee with a LEFT JOIN, label missing customers 'Unknown', count the orphans, and find the customers who did not order at all.
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Lessons in this course
- SELECT & WHERE: Filter Rows with Flags and COUNTIFS Locked
- ORDER BY & LIMIT: Rank, Top 3 with LARGE and INDEX/MATCH Locked
- GROUP BY with COUNT, SUM & AVG: COUNTIFS, SUMIFS, AVERAGEIFS Tables Locked
- HAVING: Filter Groups on Their Aggregates Locked
- INNER JOIN: XLOOKUP and the #N/A Rows a Join Drops Locked
- LEFT JOIN & NULLs: IFNA, 'Unknown' and Unmatched Rows Locked
- DISTINCT & Duplicates: First-Occurrence COUNTIF Locked
- CASE WHEN & Date Functions: IFS Buckets and YEAR/MONTH Grouping Locked