我有一個基本的存儲過程 DECLARE user_o VARCHAR(50);
SELECT user_name INTO user_o FROM users WHERE topic_id = 54 AND entry_time BETWEEN
2017-09-17 AND date_add(CURRENT_DATE, INTERVAL 1 DAY) ORDER BY entry_time
我想弄明白,因爲我循環的事情,我可以添加到一個數據框的數量在某個日期從每個倉庫收到的數量列表。 當我嘗試以下方法不起作用: if inv['prod'] not in self.inventory.columns:
## add row in
self.inventory[inv['prod']] = 0
idx = inv['time_stamp'].split('