What information does MySQL return after performing an INSERT operation?

Title: What information does MySQL return after executing an INSERT operation?

In the MySQL database, when an INSERT operation is performed, an execution result will be returned. This result can help us confirm whether the operation is successful and obtain some useful information.

First, let us create a sample database table to demonstrate the INSERT operation:

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50) NOT NULL
);

Next, we will insert a piece of data and view the execution results:

INSERT INTO users (name) VALUES ('Alice');

After performing the above operation, MySQL will return a result set, usually an integer value, representing the number of affected rows, that is, how many rows of data are affected by the insertion operation. This value can be obtained through the following code:

SELECT ROW_COUNT();

In addition to the number of affected rows, MySQL can also return the auto-incremented primary key value generated by the insertion operation, which is very useful when you need to obtain the ID of the inserted data. We can obtain the auto-increment primary key value through the following code:

SELECT LAST_INSERT_ID();

Through the above code example, we can clearly see that after executing the INSERT operation, the information returned by MySQL includes the number of affected rows and the auto-increment primary key value. key value. This information is very important for us to perform data operations and processing during the development process, and can help us confirm the operation results and obtain relevant data. This return information from MySQL can help us better control and manage database operations and improve the efficiency and accuracy of data processing.

To summarize, the information returned by MySQL after the INSERT operation is executed mainly includes the number of affected rows and the auto-incremented primary key value. Through this information, we can better perform data operations and processing. MySQL provides rich return information to help us better manage database operations.

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