Home/ Questions/Q 970659
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-16T02:50:25+00:00

How can I use the value from an outer clause inside an inner clause

  • 0

How can I use the value from an outer clause inside an inner clause using nested SELECT statements? Eg:

SELECT cost AS c, quantity, (SELECT COUNT(1) FROM accounts WHERE cost = c) 
FROM accounts

Can c be referenced in the inner SELECT clause as attempted above?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Alias the outer table (eg. FROM accounts AS a). Then you can simply do a.cost in the inner subquery.

    EDIT. That being said, there’s a better way to write this query without a sub-query for each row:

    SELECT a.cost, a.quantity, COUNT(b.id) AS count
FROM accounts AS a LEFT JOIN accounts AS b ON b.cost = a.cost
    • 0