Chapter 33 of 1961 min read
Part 3 — Summary & Key Takeaways
is the fundamental query shape; filters rows; sorts; caps the row count (always paired with for meaningful results); removes duplicates. represents missing/unknown data and must be tested with / , never . aliases let…
Sign in to read this
“Part 3 — Summary & Key Takeaways” is for subscribers. Start with a free account — it takes a name and an email — then subscribe for $1 a month to open it.
- Python and R courses free in full
- First two chapters of every other course