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With Magento's new multi-source inventory system, various new tables have been introduced into the database.

inventory_source_item contains the machine name of the source, SKU, quantity, and the status.

inventory_stock_x is a table that exists for each source, containing the SKU, quantity, and if it's salable.

Why does the second table exist, when the first could store all of that information?

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inventory_source_item

Contains inventory levels for each source. A source is a physical location (like a warehouse).

inventory_stock_x

Contains aggregated levels for each stock. A stock can consists of one or many sources.

For example, you can have 3 warehouses (sources) in GB and one stock called "Great Britain" which would sum up all your warehouses in the inventory_stock_x table.

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  • Thanks, Olivier. I think I knew that in the back of my mind, but after trying to understand the abstracted DB tables I lost sight of the big picture.
    – Geat
    Dec 16, 2019 at 19:27
  • from where I can disable inventory_source_item zero entry.
    – Roshan Rakesh Yadav
    Jul 28, 2020 at 11:52
  • @YoYoRoshan what do you mean by "disable"? If you mean to delete, well this can be done by a simple SQL. If you mean to disable its usage by Magento, you will need to disable the "Inventory" module or write a plugin to disable its usage and overwrite it with what you want.
    – Olivier
    Jul 28, 2020 at 13:30
  • @Olivier Thanks for the quick reply, I mean to remove all zero entries from inventory_source_item without SQL.
    – Roshan Rakesh Yadav
    Jul 28, 2020 at 15:41

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