How to Schedule MySQL Queries for Daily Inventory Valuation?

Scheduling MySQL Queries: An Inventory Valuation Scenario

An inventory management system typically stores product data in two tables: one for item details (table_1) and another for stock quantities (table_2). For reporting purposes, users may need to view inventory valuations at past dates. However, the current valuation is only accurate for the current day's data, as item costs and quantities can fluctuate with purchases and sales.

To address this challenge, one option is to schedule a recurring task to generate historical inventory valuations. Here's how it's possible in MySQL:

Option 1: Event Scheduler

MySQL's Event Scheduler allows you to execute scheduled tasks within the database. To schedule a stock valuation dump daily, create a table called stock_dumps with the following fields: itemcode, quantity, avgcost, ttlval, and dump_date.

Then, create an event named Dumping_event using the following SQL statement:

CREATE EVENT `Dumping_event` ON SCHEDULE
        EVERY 1 DAY
    ON COMPLETION NOT PRESERVE
    ENABLE
    COMMENT ''
    DO BEGIN
INSERT INTO stock_dumps(itemcode, quantity, avgcost, ttlval,dump_date)
SELECT itmcode, quantity, avgcost, (avgcost * quantity)as ttlval, NOW()
  FROM table_1 JOIN table_2 ON table_1.itmcode = table_2.itmcode;
END

Option 2: Cron Job

Alternatively, you can create a cron job or Windows scheduled task to execute a SQL file that performs the dump. The SQL file would contain the following statement:

INSERT INTO stock_dumps(itemcode, quantity, avgcost, ttlval,dump_date)
SELECT itmcode, quantity, avgcost, (avgcost * quantity)as ttlval, NOW()
FROM table_1 JOIN table_2 ON table_1.itmcode = table_2.itmcode;

Schedule the task to run daily, and it will generate historical inventory valuation records stored in the stock_dumps table.

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