1.创建表 t_bank

 create table `t_bank` (
      `id` bigint(20) NOT NULL AUTO_INCREMENT,
      `bank_name` varchar(50) DEFAULT '' COMMENT '银行名称',
      `branch_name` varchar(50) DEFAULT '' COMMENT '支行名称',
      `valid` int(1) DEFAULT '1' COMMENT '1.有效,0.无效',
       PRIMARY KEY (`id`)
     ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COMMENT='数据表';

2.创建备份表 t_bank_copy

 created table `t_bank_copy` (
       `id` bigint(20) NOT NULL AUTO_INCREMENT,
       `bank_name` varchar(50) DEFAULT '' COMMENT '银行名称',
       `branch_name` varchar(50) DEFAULT '' COMMENT '支行名称',
       `valid` int(1) DEFAULT '1' COMMENT '1.有效,0.无效',
        PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COMMENT='复制表';

3.创建过程 createdBankData

CREATE PROCEDURE `createdBankData`()
begin

  //临时变量
  DECLARE temp_bank_name varchar(50); 
  DECLARE temp_branch_name varchar(50); 
  DECLARE i int(100) DEFAULT 0; 
  
  //循环体
  loop_one: loop 
    //统计数据跳出循环
    set i = i+1; 
    SET temp_bank_name = concat('银行',i);
    SET temp_branch_name = concat('分公司',i);
    //插入语句
    insert into t_bank (bank_name,branch_name,valid) 
           values (temp_bank_name,temp_branch_name,'1');
    if i = 10 then     
            leave loop_one; 
    end if;
  end loop;
  
  // 存储过程之间的调用,存储过程中调用另一个过程
  // call copyBankData();
end

4.创建过程 copyBankData

CREATE PROCEDURE `copyBankData`()
BEGIN
  declare temp_bank_name varchar(50) DEFAULT '';
  declare temp_branch_name varchar(50) DEFAULT '';
   //定义标识位
  declare done int default 0; 
   //定义游标
  declare bank_list CURSOR for select bank_name,branch_name from t_bank;
   // 若没有数据返回,程序继续并将done设置为1  
  declare continue handler for not found set done = 1; 
  open bank_list;
    // 方式1,使用whlie进行循环遍历 
      while done != 1 do 
        fetch bank_list into temp_bank_name,temp_branch_name;
        if done != 1 then  
        	insert into t_bank_copy (bank_name,branch_name,valid)
             values (temp_bank_name,temp_branch_name,'1');
        end if;
      end while;

    // 方式2,使用repeat进行循环遍历
       repeat
          fetch bank_list into temp_bank_name,temp_branch_name;
          if done != 1 then
             insert into t_bank_copy (bank_name,branch_name,valid) 
             values (temp_bank_name,temp_branch_name,'1');
          end if;
          until done = 1
       end repeat;

    //方式3,loop
    list_loop :loop
        fetch bank_list into temp_bank_name,temp_branch_name;
        if done = 1 then
            leave list_loop;
        end if;
        insert into t_bank_copy (bank_name,branch_name,valid)  
        values (temp_bank_name,temp_branch_name,'1');
    end loop;

  close bank_list;
END

5.过程 tempTest

CREATE PROCEDURE `tempTest`()
BEGIN

  //变量分类: 局部变量、用户变量、会话变量和全局变量,下面定义的用户变量
  set @temp_one = '111';
  set @temp_two = '222';
  set @executeSql = "insert into t_bank VALUES(3,@temp_one,@temp_two,'1')";
  
  //预处理
  PREPARE stmt FROM @executeSql;
  EXECUTE stmt;

  //释放资源
  DEALLOCATE PREPARE stmt; 
END