mysql check multiple column in on statement - mysql

Question

I am stuck in 1 left join query in which I want to check multiple columns in on statement.
By default in the database, some column is null which I want to check in the on statement.
Now the issue is when I run a query using the OR operator it only runs the 1st condition and the rest are skipped.
If I use AND operator it throws an error.
So is there any way to get data from multiple conditions?
Here is my query:
$data = "SELECT
b.book_name, b.book_id,
b.cats_id, b.cats_id1,
b.cats_id2, b.cats_id3,
b.cats_id4, b.cats_id5,
b.cats_id6,
b.book_rating,
b.book_author,
b.book_stock,
b.book_publisher,
b.book_front_img,
b.book_status,
p.publisher_id,
p.publisher_name,
a.author_id,
a.author_name,
cat.cats_id,
cat.cats_name,
cat.cats_status
FROM
`books` AS b
LEFT JOIN `publisher` AS p
ON b.book_publisher = p.publisher_id
LEFT JOIN `author` AS a
ON b.book_author = a.author_id
LEFT JOIN categorys As cat
ON b.cats_id = cat.cats_id
OR b.cats_id1 = cat.cats_id
OR b.cats_id2 = cat.cats_id
OR b.cats_id3 = cat.cats_id
OR b.cats_id4 = cat.cats_id
OR b.cats_id5 = cat.cats_id
OR b.cats_id6 = cat.cats_id
GROUP BY
b.book_name
HAVING
cat.cats_name = '$search_data'
AND b.book_status = 1
ORDER BY
$sorting
LIMIT $offset, $page_limit"

Answer 1

You probably don't have more than one author displayed for your multi-author books either. You are misusing MySQL's notorious nonstandard extension to GROUP BY.
To troubleshoot this kind of query, disable that extension with SET sql_mode = CONCAT_WS(',',##sql_mode, 'ONLY_FULL_GROUP_BY'), then try your query again. You'll need more terms in your GROUP BY clause.
It looks like each books row has multiple category id columns. And it looks like you want to display information from your categorys table for each of them.
Use GROUP BY b.book_id, p.publisher_id, a.author_id, cats.cats_id to prevent MySQL's bizarro handling of GROUP BY from concealing your data.
I must add this: your multiple books.cats_id columns are not the SQLish way to handle your many-to-many relationship between books and categories. In the parlance of our trade, your books table is denormalized.
What you want is a new table called books_categorys with two columns, book_id and cats_id. It's called a join table. When a row is present in that table, it means a particular book is in a particular category. It's the SQLish way of handling a setup where each book can be in zero or more categorys. Here's an explanation. MySQL join many to many single row
Then you remove all the cats_id columns from books, and retrieve the categories like this.
Then you do something like this SELECT to get the categories.
SELECT books.id, books.name,
categorys.cats_id, categorys.cats_name, categorys.cats_status
FROM books
JOIN books_categorys ON books.book_id = books_categorys.book_id
JOIN categorys ON books_categorys.cats_id = categorys.cats_id
``