'新增文件’

task1

+1.create user‘todo’@’localhost’ identified by ‘123456’;
+create database todo;
+grant all on todo.* to ‘todo’@’localhost’;
+2.mysql -u todo -p
+use todo;
+3.create table user(
+              id int primary key auto_increment not null,
+              name varchar(10)
+        );
+4.insert into user (name) values (‘qwq’);
+5.delete from user where name = ‘qwq’;
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