in the process of developing a module, some code appears repeatedly in multiple business classes. I want to strip it out and write it as a separate method, but I don t know where to write it, because the method is also related to business, so it feels s...
A table field has 3 records returned by separate query B table field alone query has 8 records returned currently these two tables have no primary key and foreign key if you want to combine, how should the structure of the table be designed an...
A registration function. The function of accessing the registered url, url is to read the user names and passwords of 500 users from the excel file, read out a piece of data, run the create_user function at a time to create a user, but this will cause t...
the result returned is empty ! [picture upload.] obviously I have created a field ...
how can materialized view refresh automatically in postgres? because to do BI applications, you need to use materialized view, but it is troublesome to manually refresh every time. How can you let materialized view update automatically when the data s...
set up < input > and < P > tags when writing this form, hide the tag and show < input > when you click to modify, but want to show the text of the p tag when editing the text box. I don t know how to write this paragraph. Rookies turn to God for advic...