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Im using IN to select stuff...
WHERE categories IN ("red", "blue", "green")
This selects any item in red, blue or green categories, my question is, is there a way to select an item that has to be in all three categories?
974
12 years, 11 months ago. it's for php to know how to handle the parameters, %d – the argument is treated as an integer, and presented as a (signed) decimal number. %s – the argument is treated as and presented as a string. in your examples, $slug is a string and $this->id is an integer.
MySQL AND, OR and NOT Operators The AND and OR operators are used to filter records based on more than one condition: The AND operator displays a record if all the conditions separated by AND are TRUE. The OR operator displays a record if any of the conditions separated by OR is TRUE.
The /* is the beginning of a comment and */ is the end of comment. Let us implement and display how to create a comment mysql> /* This is the first MySQL Program */ MySQL will ignore the above comment.
In MySQL, you can use the <> or != operators to test for inequality in a query. For example, we could test for inequality using the <> operator, as follows: SELECT * FROM contacts WHERE last_name <> 'Johnson';
SELECT Item
FROM YourTable
WHERE categories IN ('red', 'blue', 'green')
GROUP BY Item
HAVING COUNT(DISTINCT categories) = 3
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