Cheat Sheets
Quick references I keep coming back to — syntax, shortcuts and the things that never stick.
Pandas ↔ SQL
The same operation in both, side by side. For when you know one and are reaching for the other.
python · sql · pandas
DAX quick reference
The patterns that come up constantly — time intelligence, filter context, and the difference between the two X functions.
power-bi · dax
Git commands worth memorising
The dozen commands that cover almost everything, plus how to undo the three mistakes everyone makes.
git · tooling
Regex for data cleaning
The small subset of regular expressions that covers most messy-column problems.
regex · python · tooling