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...
angular-cli ...
in the chat record is a card similar to that shared by official account is this a Wechat official account page or another function of Wechat? how to achieve such a function? ...
on Android 4.4, the child process is created by the parent process. According to the process id, the child process manually kill the parent process, but the child process is still running and is not killed. As a result, the child process is not re-create...
I want to hide the small icon in front of me, but it will display normally when the screen is enlarged. this is the code under normal size: < div class= "container my-1 mw-100 " style= "display:inline-block " > <i class="fas fa-tag&...
another engineering project of the company is built with vue-electron, that is, I built a server in this project, and I made a few small interfaces with koa, but because of koa2 s post request to introduce the koa-bodyparser module, the service reported...