Statistical - Related information

  • How to solve the statistics of the number of likes in the Chinese chapter of the website?

    was originally intended to use redis s HyperLogLog for statistics, but since users only have one chance to like each article, it is impossible to keep playing redis to determine whether users have liked it or not. But the efficiency of using mysql is to...

    Oct.16,2021
  • Is a column of data a statistical problem of frequency?

    there is a sample, column an is the number, column b is the number of occurrence of the number, the sample is very large, the standard deviation and normal distribution map of this sample is required, how should we deal with it with python? I ve checked...

    Mar.28,2021
  • Mysql statistical problem

    city id name 1 Beijing 2 Shanghai 3 Tianjin news Newslist id name city 1 my 1 2 my 2 3 my 2 4 my 3 find out how many messages are there in Beijing how many messages are there in Shanghai how many messages are there in Tianjin ...

    Mar.18,2021
  • Which program is usually used in website development to count the number of views today, the number of posts today, and so on?

    Reading websites often have today s page views, today s posts, today s comments and so on. Which statistical scheme is better? file + Cookie mode, the file on the server is emptied once in 24 hours. the dat file is accessed only once by the client...

    Mar.06,2021
  • PHP data statistics algorithm for guidance

    recently, we are going to do a statistics on the activity of the industry in the project, and the three factors that affect the activity of the industry are the number of posts issued by the industry, the number of comments on the information of the indu...

    Mar.02,2021
  • MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
    MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b38205-2b93f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
    MySQL Errno : 1021
    Message : Disk full (/tmp/#sql-temptable-64f5-1b38205-2b93f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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