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...
recently, I want to learn to do svg animation, but I don t know how to do it for the time being. Can illustrator do svg animation? Ask the great god for more guidance. ...
official website downloads the latest docker for Mac community version. After installation, click the icon and do not respond. I do not know how to solve p.s. 1 MacOS upgrade from 10.12 to 10.13. After opening docker, I found that there was no respo...
I would like to write this way to achieve the effect, but unbind does not work, ask God to point out how to unbind this way of writing? Thank you. ...
headers: Content-Type : application json " getProjectsByUserId " POSTheaders: Content-Type : application json ,POSTOPTIONS getProjectsByUserIdOPTIONSRESTEASY003655: No resource method found for options, return OK with Allow header500 OPTI...
I contentWindow to get the elements of the page in iframe. this error will be reported if there is no cross-domain in the chrome browser: ERROR DOMException: Blocked a frame with origin "http: localhost:8100 " from accessing a cross-origin frame. , ...