Mysql 统计每日注册人数和累计注册人数

sql 语句以下:sql   SET @i = 0; SELECT  cc.* ,(@i:=@i+cc.当日注册人数) as 累计注册人数 FROM   (SELECT DATE_FORMAT(create_time,'%Y-%m-%d') as "日期" , count(*) as "当日注册人数" FROM user_t GROUP BY  日期)cc   CROSS JOIN (select

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