I need to do a game background, but I don t know much about the back-end part, so I d like to ask the following people. I created the connection pool with the mysql module, and I see in the document that if you don t call pool.end () to close the con...
at present, the company s mysql database cannot be connected directly locally and needs to be connected through a springboard (windows server). The steps to manipulate the data each time are: connect the springboard machine (windows server,ip: 10.*...
I wrote a query in thinkphp, but I couldn t find it out, and then I printed it out . shows that it is successful. I don t know what s going on. I ask for help from all the great gods . ...
my statement is select user_vip_card . , flow_of_vipcard . , if ((user_vip_card.max_times IS NULL OR user_vip_card.max_times= 0 OR user_vip_card.max_times=9999),-1, (user_vip_card.max_times-count (flow_of_vipcard.id) AS remain_times ...
see the query on the web that is similar to name like % key , where the name column builds an index. If you want to go to the index, you can use where reverse(name) like reverse( %key ) to my surprise, name builds an index, but reverse (name) doe...
the front end has learned the basic syntax of HTML,CSS,JS, and the back end of PHP. Recently, I want to make a website and need to use a database, so I want to learn to manipulate mysql database through php. Do you have any recommendations for books or v...
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Hello as shown in the following picture, the inventory table of the clothing industry like this, how to design the database, the color and size of each order may be different. ...
because the Internet of things backend b has already provided rest api, my project wants to use the rest api interface provided by the Internet of things backend b, but I also hope that some business logic can be managed independently on the backend a. ...
the code flow goes like this: the front end calls wx.checkSession () to determine whether the Sessionkey is invalid. If it fails, call wx.login () and pass the login credential code to the backend. the backend acquires the new Sessionkey, acc...
for example, I like % R% answer, the query results include not only R, but also r, which is not what I want, I want to be case-sensitive. I guess it has something to do with the proofreading rules of the table. My table uses utf8mb4 encoding, and the pr...
1. Requirements: now the database uses mysql5.7 version, which can support GIS operation and json operation natively. However, due to various reasons, it is necessary to change the database to version 5.6, so you need to add the space expansion of mysql....
for example, this statement, results = Entity.query.filter_by (content_id=thisId,editUser=editUser). All (), , but I want to query content_id=thisId and edit user at the same time! = "test " data, please tell me how to do it. ...
python: 3.6 mysql: 8.0 Boss, how to solve ...
want to check I have a problem with MYSQL now I have installed XAMPP so my localhost already has a phpmyadmin , but I also have mysql and phpmyadmin installed on my other host (linode), so this is another MYSQL want to check if I want localhost to ...
is there any way? such as recommended books, blogs, etc. ...
Name Class Score Zhang San Chinese 81 Zhang San Mathematics 75 Li Si Chinese 76 Li Si Mathematics 90 Wang Wu Chinese 81 Wang Wu Mathematics 100 Wang Wu English 90 use a SQL sentence to query the Name of the students with the lowest Chinese sco...
High performance MySQL (3rd edition, 1st edition, May 2013) on page 390, it is mentioned that the current generation of RDBMS technology has been optimized for mechanical hard drives for decades, and the same mature and in-depth research work has not re...
when I query a piece of data, I cannot query the data after using parameter binding: the following is the sql to be queried $sql = SELECT `id` FROM `ct_collection` where `issue`=:issue LIMIT 1 ; Parameter binding is: 050 SQL: [90] SELECT `id`...
encountered a problem when typing emoji on the phone (unable to store it in the database). the reason for the utf8mb4 of the database when it is found after searching for the problem (because emoji is 4 bytes, while utf-8 s database is 3 bytes). the...
promise implements two requests, and the third step is to show the result. For the second request, you can get the result of the first request, but when you get to the third step, the res is not the res, returned by the second request. let a=new Promis...
go gorm select uses group by and order by, and the returned data is different from the original struct type, so the returned data is useless. the following is the struct information of a table in my database, which is the service alarm information: t...
{path: serviceManager , component: Cookies.get( ROLES )=== admin ?admin:user} how to solve this problem when logging out of an account with one permission and logging in to an account with another permission, and if the page is not forced to ref...
solved: File.Name is the path information, FileInfo.Name is the file name, don t be confused by the name how do I get the absolute path of a file? I don t think there are any related attributes in File or FileInfo. for example, if I pass * os.File ...
how to format and display this json? in the browser The display cannot be formatted with jsonview installed. https: p.comments.youku.com . ...