Regarding the primary key id in the mysql8.0 database, when the id is inserted using replace to be 0, the actual id is automatically incremented after insertion, resulting in the solution to the repea

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Database related development

Requirements

  The configuration file is stored. Sometimes the database does not initialize a piece of data. All you want to use is the method of updating if there is data, and inserting if there is no data.

Question

  In the actual debugging process, when it is found that the id is 0, each time the record with the id of 0 is replaced, the id will be incremented automatically, as shown below:
  

Table data structure definition and manipulation

    
  
  

Solution 1: Modify the id value, the id value cannot be 0

   Change the stored id value to 1. The verification cannot be 0. If it is 0, it will automatically add a new piece of data.

Solution 2: Modify the table structure and change the id to not increase automatically

  
  

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