What results does MySQL return after inserting data?

MySQL is a widely used relational database management system for storing and managing data. When we want to insert new data into a database table, we usually use the INSERT statement. In MySQL, when the INSERT statement is executed to successfully insert data, a result will be returned, which is the result of the insertion operation. In this article, we will discuss in detail the results returned by MySQL after inserting data and provide some specific code examples.

1. Results returned after inserting data

In MySQL, when the INSERT statement is successfully executed to insert data, an integer value is usually returned, indicating the number of affected rows. If the insertion is successful, the returned value is 1, indicating that a row of data has been inserted. If the insertion fails, 0 is returned, indicating that no data was inserted. This return result can be used as the basis for our judgment on whether the insertion operation is successful.

2. Specific code examples

The following is a simple example that demonstrates how to use the INSERT statement to insert data into a table in a MySQL database and obtain the insertion results:

First, we create a table named users to store user information:

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

Next, we use the INSERT statement to insert a piece of data into the users table , and get the insertion result:

INSERT INTO users (username, email) VALUES ('Alice', 'alice@example.com');

SELECT ROW_COUNT() AS result;

In the above code, we first insert a piece of data into the users table, and then use the ROW_COUNT() function to get the insertion operation the result of. If the insertion is successful, 1 will be returned, indicating that a row of data has been inserted.

Conclusion

Through the above code example, we can see that in MySQL, after inserting data, an integer value will be returned to represent the result of the insertion operation. We can judge whether the insertion operation is successful based on this return result. Of course, in actual applications, we usually combine exception handling and logging and other mechanisms to better manage and monitor database operations. MySQL's insert data return result mechanism simplifies the monitoring and control of database operations and helps ensure the integrity and consistency of data.

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