From a3368067609becda172245ed1f124cc06938d3a9 Mon Sep 17 00:00:00 2001 From: Matt Huntington Date: Sun, 14 Feb 2016 12:56:38 -0500 Subject: [PATCH] Update MySQLNotes.md --- MySQLNotes.md | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/MySQLNotes.md b/MySQLNotes.md index bcc4078..bc82d07 100644 --- a/MySQLNotes.md +++ b/MySQLNotes.md @@ -73,10 +73,10 @@ ALTER TABLE people ADD COLUMN id INT NOT NULL AUTO_INCREMENT PRIMARY KEY FIRST; -- AGGREGATION SELECT COUNT(*), age FROM people GROUP BY age; SELECT SUM(salary), age FROM people GROUP BY age; -SELECT AVG(salary) FROM people GROUP BY age; -SELECT MIN(salary) FROM people GROUP BY age; -SELECT MAX(salary) FROM people GROUP BY age; -SELECT GROUP_CONCAT(first_name) FROM people GROUP BY age; +SELECT AVG(salary), age FROM people GROUP BY age; +SELECT MIN(salary), age FROM people GROUP BY age; +SELECT MAX(salary), age FROM people GROUP BY age; +SELECT GROUP_CONCAT(first_name), age FROM people GROUP BY age; SELECT GROUP_CONCAT(first_name), age, height FROM people GROUP BY age, height; -- JOINS