SQL 更多行 ID 相同但列不同

Question

I am trying to replicate several rows where we have id_product, id category and position (irrelevant, it can just stay 0). I want these rows to have identical id_product but with a different id_category but it keeps telling me I am making a syntax error.

INSERT INTO `category_product` (col1, '143', 0)
SELECT col1 FROM category_product.id_product WHERE id_category = 12;

I am using MariaDB / PHPMyAdmin.

Answer 1

use insert select. selecting also the constant values

    INSERT INTO `category_product` (col1, id_product, position)
    SELECT col1 , '143',0
    FROM category_product

    where category_product.id_product WHERE id_category = 12;