1.Mysql has been installed and DB driver has been installed successfully. Failed when trying to connect to the database ERROR 2002 (HY000)Can t connect to local MySQL server through socket tmp mysql.sock (2) tried: mysql start ERROR 2002 (HY00...
spring hibernate many-to-one relationship. When transmitting data from the front end to the background, why pass the attribute .id of the foreign key, such as logo.id? if you do not pass logo.id like this, but logo,spring in this way, you will get an er...
$cardNoBegin = 1; $cardNoEnd = 10000; $where[ number ] = array( between , [$cardNoBegin , $cardNoEnd]); $list = VipCardModel::where($where)->field( id,number,issue_uid,rank )->select(); foreach($list as &$value){ foreach $value...
< H2 > the cause of the problem < H2 > recently wrote a scheduled task using quartz . This scheduled task is mainly to add something like points to members, and to keep a record of points increase, which is executed at 4 o clock every morning, but s...
Table structure: v_date is a virtual column CREATE TABLE `test` ( `json` TEXT NULL, `date` DATETIME NULL DEFAULT NULL, `v_date` DATE AS (json_extract(`json`, $.date )) VIRTUAL ) COMMENT= r n COLLATE= utf8mb4_general_ci ENGINE=Inn...
mysql> ALTER USER `db_example`@`%` IDENTIFIED BY qeW0zdszb vZjt4o ; ERROR 1819 (HY000): Your password does not satisfy the current policy requirements mysql> ALTER USER `db_example`@`%` IDENTIFIED BY qeW0zdszb tZjt4o ; Query OK, 0 rows aff...
Project is an application for local merchants to issue coupons the current demand is to sort the coupons according to the distance from the merchant problems encountered: merchants can create multiple coupons. The coupons do not have a separate loca...
I added the mainframe in LINODE, and set up ubuntu 18.04 ephemeral apache.p7.3 phpmyadmin . but I can t remotely connect to the mariadb of this host on the local 127.0.0.1? my phpmyadmin can connect to the database normally phpmyadmin 127.0.0....
how to use mysql to get data as a percentage, for example, in a table, type=1 randomly takes 40% type=2, 30% type=3, 20% type=3, the rest 10% language is thinkphp, how to write sql ...
the development of mobile app during the recent winter vacation requires Websocket to receive messages pushed in the background I use RxWebSocket to connect there s nothing wrong with writing a small demo with ws: echo.websocket.org , but replacing...
after I connected to mysql with cmd, I created the table and inserted the data, but the Chinese displayed was garbled. After , I changed the encoding to the data in the gbk,gender column and there was a problem. mysqlutf8. Navicatmysql ...
problem description my system environment is as follows: my computer system is macOS Mojave 10.14.2 Database management software is: MySQLWorkbench8.0 Database is: mysql8.0 version image container installed with docker when exporting data, t...
problem description update funds multiple times in a function, and transaction log needs to be recorded for each change. you need to re-query the changed Amount for each fund change. related codes long amountWX = 100; in...
B cannot access the database in A. I want B to use A s database, how to solve ...
I have learned a lot of knowledge and tools, as well as the basics of linux, according to books or official documents on the Internet, and I feel that the content is enough for my basic nature of use (and indeed enough for work), this is the background...
what should you do if the ip of the server is dynamic and you want to connect to the database with ip whitelist on another server I tried to fill in the whitelist of the database with the domain name after ddns, and found that it didn t work. How do ...
now the amount of data is not much, but you need to go through the interface in the loop, so 504 will appear after a while. How to solve this problem? Can I pull and insert into the table page by page? Thank you ...
in PHP, there are hundreds of excel files in different formats. If you upload and save them to the database, thank you very much. I tried to read the first line first, then modified to determine the location of each column, but will report illegal file ...
MySQL,select uses in to query. There are about 5000 items in the collection after in. There are many records in this table. The fields in in query are indexed . the original SQL is similar to this SELECT a FROM table WHERE an in ( 1x code 2 ) and o...
customer input official number can match Park No. 1 this building customer input Park No. 1 can also match Park No. 1 customer input Park No. 1 can also match this building excuse me how can I do this kind of search? I use the website built by php+mys...
I compiled my scss file with gulp, which can be uploaded to github, but, github pages shows 404? the query is shown in the picture: because it is a rookie, please give me an explanation? githubnode_modules ...
The table is roughly as follows: id sample 1 a 2 b 3 a 4 c 5 d 6 c Select the count of the sample grouping of id=3,4 (specified field) select count(sample) from table where id=3 or id=4 group by sample the current problem is that if you w...
the code is as follows series: [{ name: "", type: "scatter", coordinateSystem: "geo", data: mapData, symbolSize: function(val) { return parseInt(val[2] 10); }, label: { ...
the simple table structure is as follows < table > < thead > < tr > < th > ID < th > < th > TypeID < th > < tr > < thead > < tbody > < tr > < td > 1 < td > < td > [1,2] < td > < tr > < tr > < td > 2 < td > < td > [2,3] < td > < tr...
A user name in one of my header components is obtained through localstorage, but it must be refreshed manually before it can be displayed. Can the component refresh and obtain data by itself?-sharp-sharp-sharp problem description the environmental bac...