Introduction of MySQL transactions

-- Business ： Manage the whole business operation using things , The execution of the whole transaction is either successful at the same time , Or fail at the same time , If something goes wrong in the middle , Things roll back , The whole thing will fail ！
-- ( Regard the whole business operation as a whole , Use things to manage )
-- about DML Addition, deletion and modification of sentences , Default auto submit

SELECT @@autocommit;-- Check the status of current things ： Automatic submission （1）

-- Simulate transfer operation
-- Create an account table ,id Account No , Self growing primary key
    -- name   Account name
    -- balance amount of money
CREATE TABLE account(
    id INT PRIMARY KEY AUTO_INCREMENT,
    NAME VARCHAR(10),
    balance INT
);
SELECT *FROM account;

-- Insert two pieces of data
INSERT INTO account(NAME,balance)VALUES(' Li Si ',1000),(' Wang Wu ',1000);
-- How to start a manual commit transaction start transaction; If there is a problem in the transfer , Roll back :rollback; 
--   The whole statement is completed ( If there is no problem ) commit; Commit transaction
START TRANSACTION;
-- Li Si -500
UPDATE account SET balance=balance-500 WHERE id=1;
There is something wrong with the transfer
-- Wang Wu +500
UPDATE account SET balance=balance+500 WHERE id=2;
-- Roll back to the rollback point ( Restore the execution of the business to the initial state )
ROLLBACK;