MySQL IF 然后用数学

Question

是否可以用数学做一个 mysql if/then 语句？

说...

    if product_name = "apple"
    then divide product_price by 4
    else do no math on product_price

链接到类似这样的教程或任何帮助/方向将不胜感激。

我结束了使用 bluefeet 的方法并使用了这个。为将来可能需要的任何其他人提供样本，

    SELECT DISTINCT
    12345_parts.*,
    12345_parts.install_meter +
    12345_parts.meter_life -
    12345_parts.prior_meter
    AS nextdue,
       CASE 
          WHEN 12345_parts.part_name = "JET ENGINE"
          THEN 12345_parts.meter_life + 12345_parts.install_meter - 12345_parts.prior_meter - status_12345.meter / 4
          ELSE 12345_parts.meter_life + 12345_parts.install_meter - 12345_parts.prior_meter - status_12345.meter
       END AS remainder
    FROM 12345_parts, status_12345
    WHERE 12345_parts.overhaul LIKE '%HLY%'
    AND 12345_parts.active='ACTIVE'

Answer 1

试试这个:

SELECT IF(product_name = "apple", product_price / 4, product_price) price 
FROM products;