步步为营-51-存储过程

use DemoDB
create table bank 
(
    cId char(4) primary key not null,
    balance money 
)
insert  into bank (cId,balance) Values(‘0001‘,1000);
insert  into bank (cId,balance) Values(‘0002‘,10);
select  *　from bank;

--02  创建存储过程 ------
go
create procedure usp_转账_01
as
begin
    --02-01 捕获异常
    begin try
        --02-02 事务通过事务比较好
        begin transaction
            Update bank set balance = balance - 200 where cId = ‘0001‘
            Update bank set balance = balance + 200 where cId = ‘0002‘
        commit transaction
    end try
     
    BEGIN catch
        rollback transaction
    END catch
end

--03 执行存储过程---
exec usp_转账_01;