at present, business is a very common news. App, wants to cache the news after getting the news data, and it will also cache when switching between different columns. Because I chose vue, I saved the data in vuex. Can achieve the desired effect, but if t...
section: article: the requirement is to query out all the fields of the forum at once, and the first 10 articles belonging to this section (field id,title,content is fine). The sid in article corresponds to the id in section . ...
our company wants to set up a financial reconciliation system because of the rise in business, and then give it to me to design. data currently available: sales orders and bank flows. requires reconciliation once a month to check whether the customer...
SELECT a.time,a.ss,SUM(lt.ss) as cum FROM zz a JOIN zz lt ON a.time >= lt.time where a.time BETWEEN 20171201 and 20171231 GROUP BY a.ss ORDER BY time; how to query cumulative results in segments. The starting data accumulate from 0. Instead of ad...
question: I am using the lightning strike net custom form. In the rich text submitted to the backend, I extract the string of the html tag in the rich text string, and then I want to replace the html tag string in the rich text string with a space (tha...
after the mysql is installed on the CVM, the remote service is connected to the remote service through navicat in the local windows environment. The error is as follows: online method, change the format of the password, has been tried, will report a...
how should a like collection system design a data table? I intend to add an array to the user table, put the id of the like content in it, cancel the like, and then remove the id from the array . find a better way ...
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upload excel, parsing data. If there are a thousand pieces of data , the system will cycle to query whether each data already has the same record in the database, there is no addition, and there is no processing how to optimize ....
as shown in the figure: the fields that reply_article is " 69 " and reply_type is " 0 " and reply_aims_user is null are required. then! Here s the point. Use the reply_id in the previous query field as the primary key to associate the ...
In the statement, how to optimize the statement if there is < > 0, or a range search that is not equal to a value? and in,not in? ...
mysql5.7 version, using the tool (Navicat Premium) argument out of range pop-up prompt appears when querying the database after I check that the data format in the database is normal, if it is a numerical format, I use the same sentence bigint the ...
for example, like the Q & An on this site, what is the relationship between the structure of the data table? user list-> question table, one-to-many question table-> answer table, one-to-many answer table-> comment form, one-to-many comment table->...
now I have an array, which contains about 100000 of the data, all personId,. I now need to use this ID to query other data in another table. Is there any good way to make the query more efficient? Whether IN can be used or not, although it is easy to wri...
how should I open the index implementation on the home page of the website to query the relevant data from the background database and then bind it to the page? ...
my request: the serial field is sorted first by the first letter, and then by the number after - . It is best to split it by - rather than by subscript ...
I want to create a table to store the configuration information of the website, but I don t need to add the whole ID into one column. What do you care about this kind of information? ...
st_contains(t1.`geometry_gaode`,ST_GEOMFROMTEXT( POINT(121.48553601066067 31.371318365167735) ,4326)); after adding 4326 parameters, sometimes it can be successful, and sometimes what is the reason for reporting an error? the same sql, remains u...
mysqlword="xxxx" dbname="xxxx" tmpdb="yyyy" mysqldump $dbname -u root -p$mysqlword | mysql $tmpdb -u root -p$mysqlword xxxxyyyy mysql -u root -p MariaDB [(none)]> ...
Field id is of type int select * from table where id= 1 ; select * from table where id=1; Is there any difference in execution efficiency between the two statements? Is the first line id calculated? I seem to be the same through explain, but why...
after I log in to the website through selenium, I want to start automatically clicking some buttons on the web page. Through xpath positioning, I can t find . The code is as follows (account password is not important, you need to log in to enter the...
in ios phones, when using the $(id). Submit () method of jquery, it is found that only the post request has been initiated, but the passed parameters are empty and cannot be passed with parameters. How to solve this problem? Other browsers such as Wechat...
let time = { endDate: "2019-02-23", endTime: "17:00:35", startDate: "2019-02-23", startTime: "17:50:35" }; endDate+...
when using MyBatis, there is a problem with an incomprehensible SELECT statement. <select id="getHotelList" resultType="com.genius.travelline.product.entity.Hotel"> SELECT a.id AS "id", a.title AS "t...
there is no problem in creating a file in txt format, but when you create a file in js format, you will see that [object Object] is written like this. IndustryReader is a [{}] Array (object) format from other files. const industryReader = require(...