MySQL NOW() Function Explained

In MySQL, the function NOW() is used to return the current date and time. Specifically, the NOW() function returns a value of type DATETIME containing the current date and time.

When you call the NOW() function, it will generate a DATETIME value based on the current date and time of the database server, and return it to you. This is useful for situations where you need to obtain the current date and time, such as when recording the time data is inserted or updated.

Here is a simple example that demonstrates how to use the NOW() function in MySQL.

-- 插入当前日期和时间到表中
INSERT INTO my_table (timestamp_column) VALUES (NOW());

In this example, the NOW() function will return the current date and time and insert it into a column named timestamp_column.

In summary, the NOW() function in MySQL is used to retrieve the current date and time, making it easy to record the time at which data operations occur. I hope this explanation is helpful to you. If you have any other questions, please feel free to let me know.