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Solutions for AUTO_INCREMENT IDs in MySQL

1. AUTO_INCREMENT with Create Statement

So we have some common solutions with some built-in functions and some with procedures(Triggers) that we will create. Let’s first understand them.

  1. AUTO_INCREMENT: This is the built-in property that is used to solve the above issue. It will add the new ID after the last one automatically and we don’t have to give anything related to the primary key in the Insert statement.
  2. Trigger: This approach will require the understanding of triggers. It will trigger the procedure as soon as the insert query is run. We will create a Trigger which will run before actual insertion in the database so that we can count the id and then we can append the id by ourselves.

How to Create id with AUTO_INCREMENT in MySQL?

In all tables, we always have a primary key which is used to identify rows uniquely. For that, we generally use integers as a type of column. When adding each row, we assign a new integer to it. Whenever we insert a new row, we don’t want to manually get the last integer and use it in the INSERT query. Instead, we want an option that can automatically generate a new ID every time we try to insert it.

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Solutions for AUTO_INCREMENT IDs in MySQL

So we have some common solutions with some built-in functions and some with procedures(Triggers) that we will create. Let’s first understand them....

1. AUTO_INCREMENT with Create Statement

In this, we will look to Create a table and with it, we will mention the “AUTO_INCREMENT” As discussed it will manage the id by itself....

2. AUTO_INCREMENT with Alter Statement

Now let’s say we have a table that was created without AUTO_INCREMENT. We can use the ALTER statement to add it....

3. Create AUTO_INCREMENT Id Without Trigger

so now we won’t Auto_Increment with column. But we will mimic this behavior with triggers. The trigger will automatically be called when an insert query is applied....

Conclusion

So, Using this approach we can create a column with auto increment. This helps when we want to create a record from our backend API or service. At that time we reduce our Database calls because we don’t have to worry much about the last id. Also, it will remove the chances of any mismatch with the already present ID....

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#Databases #MySQL

1. AUTO_INCREMENT with Create Statement