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mysql 學(xué)習(xí)43--數(shù)據(jù)預(yù)分析

-- 2 數(shù)據(jù)預(yù)分析

select

count(distinct user_id) as 用戶數(shù),

count(distinct item_id) as 商品數(shù),

count(distinct item_category) as 類目數(shù)

from UserBehavior_new;


select behavior_type,count(*) as 行為次數(shù)

from UserBehavior_new

group by behavior_type;


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