MySQL: Display daily count of rows created using inner join?

I have a user and user_data table. I'm trying to display registrations by created_at and group them by today's...

From [MySQLdiscussion group] 2023-09-11 00:12:00 0  1  940

mysql - How to do scheduled notification and release on time in PHP?

Requirements/scenarios: For example, set an article to be published on 2018-5-22 13:51:16. Let me know in thre...

From [MySQLdiscussion group] 2017-05-24 11:33:02 0  9  940

关于MongoDB使用场景的疑问？

目前网站的数据库是MYSQL，里面存储了很多歌曲信息记录。我在想如果把歌曲查询部分做成从MongoDB里查询，速度是不是会快一些？以后对歌曲信息的增删写的时候，同时要跟MongoDB同步一下，是这样吧？没有NOSQL的经...

From [MySQLdiscussion group] 2017-03-11 09:18:51 0  2  938

Can mySQL in wamp be used alone?

I used to install the integrated environment wamp when I was developing with php. Now I am developing with jsp...

From [MySQLdiscussion group] 2017-06-06 09:52:15 0  3  938

MySQL sql_mode设置不生效，为何？

查看sql_mode： 设置sql_mode： {代码...} 再次查看： 退出，重启MySQL，在进入查看设置的又回去了 这是怎么回事？

From [MySQLdiscussion group] 2017-04-17 14:42:47 0  3  937

多表删除问题

输入命令： SELECT a.goods_id,a.goods_name FROM tdb_goods AS a LEFT JOIN (SELECT goods_id,goods_name FROM tdb_goods ...

From [MySQLdiscussion group] 2016-12-21 18:01:39 0  2  935

[MySQL] How to store array appropriately?

In actual practice, sometimes it is appropriate to use an array to store the content of a field. For example, ...

From [MySQLdiscussion group] 2017-06-20 10:05:33 0  2  933

window下mysql中文乱码怎么解决？？

window环境，mysql5.1.71配置文件中设置了： [mysql] default-character-set=utf8 [mysqld] character-set-server=utf8 而且 像类似： ch...

From [MySQLdiscussion group] 2017-04-17 15:02:01 0  3  933

php - msyql4 characters

Original sql field information: koubei_desc text COMMENT 'Word of mouth description (optimal)' I want to modif...

From [MySQLdiscussion group] 2017-07-04 13:43:26 0  1  931

python - flask-sqlalchemy How to set fields in json format

flask-sqlalchemy How to set fields in json format

From [MySQLdiscussion group] 2017-05-18 10:47:02 0  1  931

安装mysql-5.7.12-linux后，启动报错，求解读

service mysql startStarting MySQL...The server quit without updating PID file (/usr/local/mysql/data/CDCS-2130...

From [MySQLdiscussion group] 2017-04-17 14:44:40 0  1  931

MySQL: Retrieve sum of grouped rows from aggregate results

Suppose I have statistics on the number of visits by users in each country: The query is as follows: SELECTcou...

From [MySQLdiscussion group] 2024-02-26 23:21:28 0  1  930

Mysql: "The connection attempt failed because the connecting party did not respond properly after a period of time"

I have a project using AspNetMVC4.5.2 and Mysql database. For a few days, my project started getting errors fr...

From [MySQLdiscussion group] 2023-09-21 14:59:55 0  1  929

Looking for an answer: Can't access the virtual server?

I have downloaded mysql several times and it was accessible the first time but not after that.

From [MySQLdiscussion group] 2018-04-06 16:09:45 0  2  929

Does anyone have detailed tutorials on mysql5.7 installation?

I feel that installing nginx and php is relatively simple, but mysql is more troublesome. The official website...

From [MySQLdiscussion group] 2017-05-24 11:33:16 0  2  929