I used knex, in the background to change that statement to knex version or knex or directly support utf-8 statement query can also select * from tailor order by convert(province using gbk) ...
because of the company s business needs, monitoring users consumption, phone calls and other records, so I also tried to simulate login to get cookie, but it seems to fail. currently use simulated login ...
referenced tutorials: https: www.digitalocean.com . https: linode.com docs datab. Environment: cetnos7,openresty, has been installed and php7,info.php also appears normal. Previously installed mariadb, and uninstalled, now install mysql5.5 the pr...
I want to change the place shown in the picture to null ...
at present, there is a demand. Alipay or Wechat can be used to pay for second-kill merchandise activities, but the problem is that the demand must be paid before deducting inventory, and placing an order does not reduce inventory. In other words, when A...
SELECT DB33, Stream, Coil, MAX(Time) AS time, `View` FROM result_video_szy GROUP BY DB33 order by NULL problem description: 1. 2.query 3.order by NULL:mysqlsort 4. ...
Today, the server of the program has been changed, and the program can run, and WeChat Pay has no problem, that is, when calling Wechat to stop recording API (wx.stopRecord), fail, Code: function wxRecStop(recNext) { wx.stopRecord({ succe...
consult data: 1. MySQL transactions are isolated, and the intermediate state in the transaction process is not visible; 2. MySQL dirty reading means that a transaction is making changes to a record, and the data of this record is in an inconsistent st...
after the order exceeds a certain time, the user does not confirm the receipt, so the system needs to automatically complete the confirmation operation, that is, to change the status of the order. Do you have any good ideas? I have seen before that so...
what is stored in the database is the html code, which is mainly a piece of div content, including the style, does not contain the body and other tags, and the label is strict in opening and closing. If I want to query the keyword "class " now, if I us...
https: www.jianshu.com p 8fc. including all the methods above in this link, have tried, or can not connect, anxious, for several days, please have a look? ...
1 telnet localhost 3306 can reach 2 telnet remote ip 3306, but 3 has nothing to do with the firewall. Before fire, it is turned off 4 bind to 0.0.0.0 my.cnf . Please have a look. ...
A field that increments itself from 0, how to get it to start counting again under certain conditions (starting from 0), instead of emptying the database, has several of this field. for a stir-fry Mini Game, the user s stir-fry field is added once. ...
Spring boot uses jpa to operate MySQL InnoDB; for example: products; id; quantity; ; id=3211: I see the sql statement on the Internet is: SET AUTOCOMMIT=0; BEGIN WORK; SELECT quantity FROM products WHERE id=3 FOR UPDATE; UPDATE products SET quan...
1. Find the score of the grouping in table an and sort it 2. a Table id openid groups grouping b Table id openid step score openid is the associated field of two tables 3. Get the sum of groups grouping corresponding to step scores in tab...
the business table has too much data to design 4 sub-tables, and then the requirement is to export the full data of the 4 tables. Test machine 4 cores. Start 4 threads to query at the same time, and summarize the final results. if it takes 2s for a ...
SELECT * FROM bg_qa where id in (select id from bg_qa where tenant_id=3 and package_id in (0) and status = 1 and category_id in (1574) union select belong from bg_qa where tenant_id=3 and package_id in (0) and status = 1 and category_id in (1574)) th...
with regard to count () optimization, it is better to build a smaller secondary index after MySQL version 5.7.18. I know that clustered indexes are bloated than secondary indexes, but if you just count, you don t have to scan the entire data row, jus...
Hello everyone, the latest project needs to be docked with the interface of a mall, simply to call their various interfaces, such as ordering, commodity inquiry, freight and so on. in accordance with the previous practice, in order to facilitate stati...
as shown in the figure, how to get to the quotation marks on both sides of the queue and return the data in array format ...
angular project introduces echarts (4.1.0), ngx-echarts (4.0.0), @ types echarts (4.1.0), and reports an error after starting the project ...
render the page according to the one-dimensional array ...
problem description < H2 > (the question has been updated, please take a look at the following. Thank you) < H2 > Today, open the company s website and display a loading error. there are no back-end developers for the time being because the compan...
quote= " ; function t() { echo "${1}" echo "${2}" echo "${3}" } a="xxx yyy"; b="yyy zzz"; c="aaa.bbb"; cmd= t ${quote}${a}${quote},${quote}${b}${quote},${quote}${c}${quote} ev...
when developing react-native applications, the expo, I use uses fetch to request data from the backend, and the Android simulator on my computer can return data normally. When testing with a mobile terminal on the same network, can network request failed...