Import CSV to Update only one column in table

Question

I have a table that looks like this:

products
--------
id, product, sku, department, quantity

There are approximately 800,000 entries in th

Answer 1

You can use LOAD DATA INFILE to bulk load the 800,000 rows of data into a temporary table, then use multiple-table UPDATE syntax to join your existing table to the temporary table and update the quantity values.

For example:

CREATE TEMPORARY TABLE your_temp_table LIKE your_table;

LOAD DATA INFILE '/tmp/your_file.csv'
INTO TABLE your_temp_table
FIELDS TERMINATED BY ','
(id, product, sku, department, quantity); 

UPDATE your_table
INNER JOIN your_temp_table on your_temp_table.id = your_table.id
SET your_table.quantity = your_temp_table.quantity;

DROP TEMPORARY TABLE your_temp_table;