Today we are going to study web Development level mysql Subversion practical course No 9 No class MYSQL Business ( One ): Understand affairs in vernacular . There are two lessons ahead The first 7 speak : Commodity system design ( Four ): Custom attribute of commodity attribute design , The first 8 speak : Commodity system design ( 5、 ... and ): One dimensional attribute of commodity price table design notes I omit , No reason , Personal hobbies .

Transaction , To understand in the teacher's vernacular is :

1、 There's more than one step to take .2、 Each of these steps is carried out according to the established idea , One wrong step, then the whole process will go back .3、 When the business is going on , External interference cannot affect .

This is a basic explanation of the teacher , First, let's create a user balance table , This table we use is Innodb Pattern , In this mode, each step is actually a transaction . Here's the balance sheet user_balance:

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" 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For demonstration purposes , Let's insert some data

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" 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Let's use

show VARIABLES like '%COMMIT%'

aaarticlea/png;base64,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" alt="" />

We can see from the above query results that ,autocommit ( Automatic submission ) Of VALUE The value is ON.

Now we will test according to the course content , I won't take notes on the specific contents , Give priority to practice .

Last lesson :mysql Notes on subversion ( 6、 ... and )-- Commodity system design ( 3、 ... and ): The fixed attribute of commodity attribute design

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