Step-by-step guide to merging columns in Excel using 7 methods: Ampersand, CONCAT, TEXTJOIN, Flash Fill & Power Query. Includes formulas, troubleshooting, and pro tips for data management.

Comprehensive guide to Pandas join operations with real-world examples. Learn merge vs join syntax, join types (inner/left/right/outer), performance optimization, error solutions, and advanced techniques for efficient data manipulation.