Import values from temporary table to another table?

I’m joining 3 tables:

SELECT 
catalog_product_entity.entity_id AS product_id,
catalog_product_entity.sku,
customer_entity_varchar.entity_id AS customer_id,
customer_entity_varchar.value,
customer_entity_varchar.attribute_id,
import_tmp.customer,
import_tmp.grp,
import_tmp.qty,
import_tmp.price
FROM catalog_product_entity
    INNER JOIN import_tmp 
    ON catalog_product_entity.sku = import_tmp.sku
    INNER JOIN customer_entity_varchar 
    ON import_tmp.customer = customer_entity_varchar.value OR import_tmp.grp = customer_entity_varchar.value
    WHERE customer_entity_varchar.attribute_id = 139 OR customer_entity_varchar.attribute_id = 140

Currently, I’m fetching the data, build a new array and insert it into my final table.

INSERT INTO final_table(`c_id`, `p_id`, `price`) VALUES (customer_id, product_id, price);

However, I wonder if it’s possible to do this in one go, so basically directly from the temporary table?

Answer

Yes. Use INSERT . . . SELECT:

INSERT INTO final_table (c_id, p_i`, price)
    SELECT cev.entity_id AS customer_id,
           cpe.entity_id AS product_id,
           it.price
    FROM catalog_product_entity cpe JOIN
         import_tmp it
         ON cpe.sku = it.sku JOIN
         customer_entity_varchar cev
         ON cev.value IN (it.customer, it.grp)
    WHERE cev.attribute_id IN (139, 140);

Note that I introduced table aliases. These make the query easier to write and to read. And IN is easier to follow than repeated OR conditions.