sql = "UPDATE arms SET gem2= %s WHERE id = ( %d )" % ( ,new_id) (1054, "Unknown column gem2 in field list ") sql = "UPDATE arms SET gem2= WHERE id = ( %d )" % new_id (1054, &quo...
python3.6+pymysql+mysql8.0 you can log in normally with your root account in terminal, as shown in the following figure pymysql it s not okay to create a new user, but you can log in normally in terminal. preliminary judgment is still a proble...
insert but the data is a number, which is stored in the database as a string, and the corresponding field in the database is also of string type The python statement goes like this: sql = insert into uhaoma343 (riqi,uhaoma) values({},{}) .format(r...
some data are like this: 1186486, 0215648, 00064876, mysql stores data to columns of char type, data is stored in front of 0, all columns are killed. How to solve the short ones are preceded by 0, and the data is a string in python and does not ki...
iview uploaded files can be uploaded multiple times. You only want to upload them once. How to limit them? there is no detailed description on the official website API . ...
problem description deployment projects an and bjord tomcat under tomcat deploy a first, then b. two projects are logged in using login in LoginController respectively. Xtuser uses @ Validated to verify the parameter userid passed in the front end. A...
in the following code, external variables cannot be fetched within $where, for example, req, prompts that req is not defined. Why is the solution? router.get( get ,(req,res)=>{ comments.find({$where:function(){ return this._id===req.que...
problem description implement a highlight function in the react project. When you click on the DOM, how to remove the className? of the sibling elements the environmental background of the problems and what methods you have tried [environment]: th...
Why do both return the same value in the same browser? ...