I recently did a raffle everyone can only draw once I want to insert a record for each lucky draw request, and then read the first record for comparison to determine whether he is drawing the lottery for the first time, delete the useless record if n...
in a high concurrency environment, how to write a record to MySQL5.5 with PHP and how to return the id? of the record just inserted High concurrency High concurrency High concurrency how to return the id? of the record currently inserted MySQL ve...
when using Mybatise, I use the following code to operate on the database. No error is reported, and it executes successfully, but the database does not find data @Test public void testInsertUser(){ SqlSession sqlSession = sessionFactory.o...
because batch update operations are always involved recently, I don t know if batch operations can be performed, so we can only update, one by one in the loop , so I d like to ask whether there is a sql statement in the sql database that enables updat...
is somewhat similar to the open source Chinese app, dot plus sign to expand a few options. That framework unfolds more. ...
problem description what to do if ant-design datePicker sets the default value to empty the environmental background of the problems and what methods you have tried the following conditions will occur at present related codes Please pas...
github downloaded nginx-admin,java8 compiled, imported eclipse Times error, looked at the following code, there are several similar statements import com.jslsolucoes.nginx.admin.model.Nginx; import com.jslsolucoes.nginx.admin.model.Nginx_; In the mode...
when using bluebird and nodejs native Promise to execute the following code, the order of execution is somewhat different. What is the reason for this? ** * bluebird, 2 3 5 6 1 4 * Promise 2 3 5 6 4 1 * var Promise = require("bluebird"...
what is the difference between the local network IP from Baidu and the IpV4 from ipconfig? if the ipv4 is not the same as the native ip from Baidu, am I equivalent to the connected local area network (intranet)? ...