Headers
Recommender Systems
Machine Learning
Bash
Python
Visualization
Ireland Property Price Trends
Life in IE
육아 팁들
What does the numbers in the SQL clause “GROUP BY 1” mean?
SELECT account_id, open_emp_id ^^^^ ^^^^ 1 2 FROM account GROUP BY 1;
GROUP BY 1 refers to the first column in select statement which is account_id.
No comments:
Post a Comment
Newer Post
Older Post
Home
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment