want to ignore duplicate raws on group result - mysql

Question

Result Right Now , want to ignore dulicate
id_category name id_manufacturer name
6 CLOTH of House 12 Sabb
6 CLOTH of House 12 Sabb
6 CLOTH of House 14 CTES
8 Sabih Nopoe 12 Sabb
I want this Result remove duplicate and heading changes
id_category Man-name id_manufacturer Cat-name
6 CLOTH of House 12 Sabb
6 CLOTH of House 14 CTES
8 Sabih Nopoe 12 Sabb
SELECT
p.id_category_default,
c.name,
p.id_manufacturer,
d.name
FROM
psup_product p
INNER JOIN psup_manufacturer d ON
p.id_manufacturer = d.id_manufacturer
INNER JOIN psup_category_lang c ON
p.id_category_default = c.id_category
WHERE p.id_category_default > 2
GROUP BY p.id_product
ORDER BY p.id_category_default

Answer 1

Your code show you're working on PrestaShop table
this code will work please check
SELECT
p.id_category_default,
c.name as Man-name,
p.id_manufacturer,
d.name as Cat-name
FROM
psup_product p
INNER JOIN psup_manufacturer d ON
p.id_manufacturer = d.id_manufacturer
INNER JOIN psup_category_lang c ON
p.id_category_default = c.id_category
WHERE p.id_category_default > 2
GROUP BY d.id_manufacturer
ORDER BY c.id_category

Answer 2

You can remove duplicates by selecting DISTINCT values or by GROUPing. DISTINCT will return only distinct values across all the columns you selected. GROUPing will group rows into summary rows by the fields you group by.
Here either adding DISTINCT after your SELECT statement, or including all the fields in your SELECT statement in your GROUP BY statement should return distinct records. Because you grouped by id_product which is not in the SELECT statement, it will not remove duplicates.
Examples in code would be:
Updating SELECT statement to include DISTINCT
SELECT DISTINCT --Adding DISTINCT keyword
p.id_category_default,
or, updating GROUP BY statement to include all fields in the SELECT statement.
GROUP BY --Removed p.id_product from the grouping and added fields from SELECT statement.
p.id_category_default,
c.name,
p.id_manufacturer,
d.name