MySQL查询案例

Question

这是我的代码，我有 2 列 - 调制解调器 = 字符串，总计 = 整数

SELECT `Modem`, `Total`,
CASE `Modem` WHEN 'Yes' THEN
(`Total`+ 50)
ELSE
(`Total`+ 0)
END AS ModemAndTotal
FROM invoices

当调制解调器=“是”时，我需要将 50 添加到总数(总计 + 50)

Answer 1

尝试如下:

SELECT `Modem`, `Total`, CASE WHEN `Modem` = 'Yes' THEN (`Total`+ 50)
                         ELSE
                         `Total`
                        END AS ModemAndTotal
FROM invoices