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不行,SUM 函数不能直接用于非数值数据。SUM 函数专为数值数据而设计。不过,在某些编程语言中,您可以先将非数值数据转换为数值数据,然后再使用 SUM 函数。 SUM 是否总是需要数值范围? 不一定。虽然 SUM 函数常用于数值范围,但在许多编程语言中,它也可以对单个数字进行操作。该函数将简单地返回您提供的数字之和。
while the sum function itself doesn't calculate averages, it can be used as part of the process. to find the average in sql, you would sum up the values using the sum function and then divide them by the count of the values, which can be found using the count function. can i use...
barrybruce
While I produced the show when I was on the cruise ship, including music production, we spent the week leading up to the show in Singapore rehearsing the show. Adeline designed the lighting cues and coordinated with the logistics, venue and client to ensure all was in order by the time we...
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