if MySQL is a few questions about master-slave synchronization 1) can one slave synchronize data from multiple master, or can one slave only work for one master and one master for multiple slave 2) must their database names be the same for master and...
I know that mysql master and slave have been configured, but I don t know what to do if one of them dies: 1. If there is only one master and one slave, do you want to upgrade the master manually in case the master dies? (it seems that you can t call...
Code first: entity class: @Entity @Table(name = "joinTable_a") public class JoinTableA { @Id @GeneratedValue private long id; private String name; @OneToOne @JoinTable(name = "join_a2b", joinColumns = @JoinColumn(n...
want to do typing animation through pure css. At present, it is possible to achieve pure English and pure Chinese, but when mixing English and Chinese, it is impossible to achieve the desired effect because Chinese characters account for 2ch while Engli...
vscode will get a red dot error when writing flow code is there any solution ...
when scrolling up and down, the red area is fixed when scrolling left and right, the blue area is fixed. doesn t know how to implement it, in rn. ...
for example, why can the max () method be called $this- > max ( id ) as well as statically self::max ( id ) ? ...