Home/ Questions/Q 7634671
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-31T07:14:21+00:00

I have the following SQL statement which returns Not unique table/alias . I’m fairly

  • 0

I have the following SQL statement which returns “Not unique table/alias“. I’m fairly sure I’m just missing something obvious here, possibly not being specific enough when referring to StockID as it’s a common field name to Stock and SuppliersStock. Primary Key in Stock, Foreign Key in SuppliersStock

SELECT Stock.BuyingPrice, SuppliersStock.StockID, SuppliersStock.Quantity
FROM Stock
LEFT JOIN Stock on Stock.StockID = SuppliersStock.StockID 
WHERE Stock.StockID = <some-integer />

The Stock table has specific information about stock, Suppliers has info on suppliers and SuppliersStock has information orders for new stock with foreign key references to Stock and Suppliers.

What I want to do is return the BuyingPrice (from Stock), StockID, Quantity (from SuppliersStock) fields so I can produce a list of costs for ordering in new stock.

Disclaimer: I know, another question on SQL joins. Don’t hurt me! I’ve Googled, I’ve searched but I’m a bit befuddled and I’ve honestly tried to look for a similar question to learn more about what I can do to solve this myself but come up trumps. Please help?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Looks like you are skipping the alias to SuppliersStock, or it is a different table:

    /* If SuppliersStock is a different table */
SELECT Stock.BuyingPrice, SuppliersStock.StockID, SuppliersStock.Quantity
FROM Stock
LEFT JOIN SuppliersStock on Stock.StockID = SuppliersStock.StockID 
WHERE Stock.StockID = <some-integer />

/* If SuppliersStock is the same table, needing an alias */
SELECT Stock.BuyingPrice, SuppliersStock.StockID, SuppliersStock.Quantity
FROM Stock
LEFT JOIN Stock AS SuppliersStock on Stock.StockID = SuppliersStock.StockID 
WHERE Stock.StockID = <some-integer />
    • 0