Query to fetch Database value in a specific order using PHP and MySQL

Question

I need one help.I need to fetch value from database by joining two table and that will be in a given order. I am explaining table below.

db_cat:

cat_id    cat_name   order

1          food        1

2          Drink       2

3          Ice         3

db_subcat:

subcat_id    subcat_name   cat_id   order

1            pizza          1         1

2            chiness        1         3

3          Stampede Party  1          2

4          Wine            2          1

5         HAPPY HOUR       3          1

6           BS             1          4

my expected output is given below.

pizza, Stampede Party, chiness,BS , Wine , HAPPY HOUR

From the above two table i need all subcat_name and that is only as per db_cat order column and db_subcat order column.Here the subcat_name under food should come first and that should also follow the db_subcat order column and so on.Please help me to write this query.

Answer 1

you use ORDER BY to order the columns, you can use multiple columns in an order by Read here for more info

SELECT subcat_name
FROM db_subcat
JOIN db_cat ON db_cat.cat_id = db_subcat.cat_id
ORDER BY db_cat.order DESC, db_subcat.order DESC

This is pretty basic, you should read up more on mysql and find examples to learn from.

Answer 2

Use ORDER BY and try below query. It will first set order by with db_cat orderby field and then order by with db_subcat order by field.

ASC for ascending order and DESC for sescending order.

SELECT ds.subcat_name FROM `db_subcat` as ds 
JOIN db_cat as d ON d.cat_id=ds.cat_id 
ORDER BY d.orderby,ds.orderby ASC;

Output

Answer 3

以下是解决方案：

SELECT * FROM db_subcat AS sc LEFT JOIN db_cat AS c ON sc. cat_id = c. cat_id ORDER BY c.order ASC, sc.order ASC