匿名通过本文主要向大家介绍了SQL,平均数等相关知识,希望本文的分享对您有所帮助
sql下求列的平均数的语句
代码如下:
SELECT CAST(SUM(score_comments_) / COUNT(*) AS decimal) AS score
FROM Comments_Toysgogo_
WHERE (aboutid_comments_ = 81) AND (table_comments_ = 'product')
sql下求列的平均数的语句
代码如下:
SELECT CAST(SUM(score_comments_) / COUNT(*) AS decimal) AS score
FROM Comments_Toysgogo_
WHERE (aboutid_comments_ = 81) AND (table_comments_ = 'product')