SQL Select Statement with WHERE, AND, OR

Question

I would like to perform a SELECT query with MySQL. My goal is to select all the dogs in a vet database that would be sex=male and fur=short

Answer 1

According to Operator precedence for MySQL AND has higher precedence than OR.

So C1 AND C2 OR C3 will be treated as (C1 AND C2) OR C3

To override the default precedence you need to use parenthesis as:C1 AND (C2 OR C3)

In your case the right query is:

SELECT name, sex, fur, color 
FROM dogs 
WHERE sex='male' AND fur='short' AND (color='black' OR size="big");