SQL
SELECT
SELECT picks which columns you want back.
* means "every column"; naming specific columns
(comma-separated) returns just those.
Example: selecting specific columns
SELECT name, score FROM students;name | score
Ada | 92
Chidi | 78
Musa | 85Naming exact columns instead of always using * matters
for a real, practical reason once tables get wide, fetching only what
you actually need is faster, uses less memory, and makes it obvious to
anyone reading the query exactly what data it depends on.
SELECT name, score FROM students;name | score
Ada | 92
Chidi | 78
Musa | 85