我正在尝试将两列合并为一个逗号分隔的列。我确实尝试了concat函数,但没有成功。如何将它们合并为逗号?我真的需要用逗号将subcat_id移到cat_id。
cat_id subcat_id
49,417 417
49,416 416
49 415
49 414
答案 0 :(得分:0)
尝试CONCAT_WS()
,如下所示:
def average_salary(data, lower_age, upper_age):
u = dict(sorted(data_cleaned.items()))
count = 0
for i in u:
age = u[i]['age']
sal = u[i]['salary']
tally = 0
if age is not None and sal is not None and lower_age < float(age) < upper_age:
tally += float(u[i]['salary'])
print(u[i]['salary'])
答案 1 :(得分:0)
正确的答案很简单=;
更新表集字段CONCAT_WS(',',cat_id,sub_cat_id) 其中field = field