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是否有可能从《WHERE条款》中获取数据?
原标题:Is it possible to capture data from a WHERE clause?

我的假设是,在<代码>中计算某些东西的百万分之一。 WHERE 我的KQ条款,但我也希望得到这一计算,因为它耗资巨大。 能否取得<代码>中所做工作的成果 WHERE 条款如下:

SELECT `foo` FROM `table` WHERE (foo = LongCalculation(`column`))

富有想象力或有可能与我的SQL?

http://www.un.org。 计算为依附栏

最佳回答

改写“珍视”思想的范畴。

set @bar = 0;

SELECT
  `product_name`,
  @bar AS `stock`
FROM `jos_vm_product`
WHERE (@bar := `product_in_stock`) > 0 
问题回答
set @bar = LongCalculation();
select foo from table where foo=@bar;




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