我有这个查询,它有以下输出:
SELECT o.date AS Date,
u.firstname AS FirstName,
u.lastname AS LastName,
m.name AS MealName
FROM catering.user u
LEFT JOIN catering.order o
ON u.iduser = o.iduser
LEFT JOIN catering.meal m
ON m.idmeal = o.idmeal
WHERE o.weeknumber = 37
GROUP BY u.firstname,
o.date
ORDER BY o.date;
我需要的是编写一个查询来获得以下输出:
我关注了与动态数据透视查询相关的其他帖子,但 MySql 对我来说是一个新主题,我不知道如何在我的情况下使用准备好的语句?
我得到的错误信息是:
PREPARE stmt FROM @sql Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NULL' at line 1
我正在使用 MySql Workbench 6.0 CE