Student information management needs to be designed in the project. Contains grade, class, students and other information.
but there is a problem. The grade of the students changes every year, and the first grade is promoted to the second grade.
how can I design to meet this requirement?
three ways:
this must be designed according to the actual situation . The actual situation is:
1. Students are not linked to grades, students are linked to classes.
2. The grade to which the class belongs changes from year to year, so the grade is calculated.
3. The grade of the class is calculated by the enrollment year of the class. A class is a kind of establishment, and after a class is created, the grade it belongs to will only increase every year.
in terms of design, it is:
1, the student has a field of the class to which he belongs;
2, the class has a field of the year of enrollment.
the advantage of this design is that no matter whether a student is dropping out of school or failing or skipping grades, as long as he is in the right class, he will certainly get the right grade.
also be sure to consider the current month. The same class belongs to two different grades in April and November.
Previous: Wechat wx.onMenuShareTimeline () ios part of the mobile phone will not trigger the callback function
Next: How to integrate the jq plug-in into ant design pro? ask the boss for help?
recently I was learning jwt, but encountered a problem. the user enters the user name and password and sends it to the server, which encrypts it and returns it to token, with this token for every front-end request. so I have a problem: if the user ent...
Please explain in detail if you have the picture, ...
function Test(){ this.func1=function(){ console.log("func1") } this.func2=function(){ console.log("func2") } this.func3=function(){ console.log("func3") } this.all=function...
background: the backend crawls the details pages of other websites. If you want to put them in our mobile phone app and keep the style uniform, you cannot use iframe. But we are not sure about the complexity of this detail page. There may be table, i...
there is such a demand at present: <view wx:for= {{getUserInfo}} wx:key= index wx:for-index= index > <!-- --> <view>{{item.name}}< view> <!-- --> <view>{{setUserName}}< view> < view&...
products require this implementation. Is this feasible? Our project is mainly running in Wechat, ...
< H1 > html: < H1 > upload multiple images using input, and confirm after selecting multiple images. < H1 > jquery: < H1 > use jquery to obtain the data of the files object in the input node, for example, there are five image files in the acquired...
onCheckForUpdatetrueconsole ...
< div id= "text " > my Baidu < script type= " text javascript "> var txt = document.getElementById ( text ). InnerHTML; var regexp = (http: |https: )((w|=|?|.| |&|-)+) g; regular match txt1=txt.replace (regexp,function ($url) {) return...
because the web page is a sports data web page, the page will be stuck when you hang a large amount of data in the background on the weekend, so please tell us how to monitor the page hanging in the background for more than a certain period of time and p...
how can this level be changed? ...
problem description We report that the title occasionally has this kind of garbled code (these are four garbled codes): 2019, using the re to the end of the line. (these are four pieces of garbled code): 2019, using the re to the end of the line,...