小编Oma*_*lim的帖子

我正在尝试从 mysql 存储过程中的不同表中进行多次选择，如下所示

DELIMITER //  
CREATE PROCEDURE `NovemberSummary`(IN `branch` VARCHAR(60), IN `year` INT) NOT 
DETERMINISTIC CONTAINS SQL SQL SECURITY DEFINER 
BEGIN
select sum(sales.amount) as Sales from sales where month (sales.date)= 11 and 
sales.branch = branch;
select sum(expenses.amount) as Expenses from expenses where month(expenses.date)= 11
and expenses.branch = branch;
END

但它只返回第一个选择，因为结果集中只包含销售列。

MySQL 版本为 5.6.11 - MySQL 社区服务器