recently, I have been studying the scheme of sub-database and sub-database. I don t have much experience. If you have any questions, I will ask you for advice. for example, an order table with fields: placing an order for id, goods, id, store, id, iss...
every amount change of the user is recorded in this table. website users about 100W, now the table is too big, thought of sub-table, how to divide it? Table structure! user id is a 32-bit guid ...
to query the data after horizontal split, suppose the data of a business is split horizontally, and the monthly records are stored in a table. The data of each table is about 1000w. There are already more than 20 tables, such as table_201606,.,table_201...
I use element to upload images and send extra parameters. How do I get these extra parameters? the file I printed on on-success is like this. What are the extra parameters of,: data? part of the code: <div v-for="(color_info,index_color) i...
I need to use an open api now, but this api needs a key for verification, and I need to fill in an ip. My interface to access the api directly at the front end is 403, so I wonder if I need a server to transfer and there is no way to solve the key proble...
Client code: -sharpinclude <arpa inet.h> -sharpinclude <unistd.h> -sharpinclude <stdio.h> -sharpinclude <sys types.h> -sharpinclude <sys stat.h> -sharpinclude <string.h> -sharpinclude <fcntl.h> -sharpinclude &l...
<div draggable="true"> <input > < div> if input is worth it and cannot be selected by mouse, div will be dragged it is not valid to add draggable= "false " to the input element; ...
A SpringBoot project will call a client program implemented in Netty when an address is accessed. The client will communicate with the server also implemented in Netty and get the result, and then return the result in Json format. This is the whole proc...