Import CSV to Update rows in table

csv, import, mysql, phpmyadmin

Solution

You can use temporary table to hold the update data and then run single update statement.

CREATE TEMPORARY TABLE temp_update_table (meta_key, meta_value)

LOAD DATA INFILE 'your_csv_pathname' 
INTO TABLE temp_update_table FIELDS TERMINATED BY ';' (meta_key, meta_value); 

UPDATE "table"
INNER JOIN temp_update_table on temp_update_table.meta_key = "table".meta_key
SET "table".meta_value = temp_update_table.meta_value;

DROP TEMPORARY TABLE temp_update_table;

Problem

There are approximately 26K products (posts) and each product has meta values like this: The post_id column is the product id in db and the _sku (meta_key) is the unique id for each product. I've received a new CSV file that updates all of the values (meta_value) for _sale_price (meta_key) of each product. The CSV file looks like: SKU, Sale Price How do I import this CSV to update only the _sale_price row based on the post_id (product id) & _sku value? Output Example: I know how to do this in PHP by looping through the CSV and selecting & executing an update for each single product but this seems inefficient. Preferably with phpMyAdmin and by using LOAD DATA INFILE.

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