Custom formulas let you dictate exactly what goes into cells.
In 2026, data analysis roles still depend heavily on two practical tools: Excel for cleaning, checking, and working through business data, and Tableau for turning that data into dashboards people ...
It replaced my date-filling workflow, and I'm not going back.
ChatGPT can assist with complex Excel formulas, including a VLOOKUP plus IFERROR to return not listed when no match appears.