Shulou(Shulou.com)06/01 Report--

How does mysql delete all data in a data table? This problem may be often seen in our daily study or work. I hope you can gain a lot from this question. The following is the reference content that the editor brings to you, let's take a look at it!

Mysql deletes all data in a data table: use the DELETE statement of SQL to delete all data in the syntax format of "DELETE FROM data table name;"; in the DELETE statement, you can also set the "WHERE" clause to define the deletion conditions for the delete operation and delete the records specified in the data table.

In MySQL, you can use the DELETE statement to delete one or more rows of data from a table.

Grammar

The following is the general syntax for the SQL DELETE statement to delete data from the MySQL data table:

DELETE FROM data Table name [WHERE clause] [ORDER BY clause] [LIMIT clause]

The syntax is as follows:

Datasheet name: specifies the name of the table to delete the data.

WHERE clause: optional. Indicates that you can specify any condition in the WHERE clause to qualify the deletion condition for the delete operation. If no WHERE clause is specified, all records in the MySQL table are deleted.

ORDER BY clause: optional. When you delete, the rows in the table are deleted in the order specified in the clause.

LIMIT clause: optional. Used to tell the server the maximum value of the deleted row before the control command is returned to the client.

You can delete records in a single table at once; the WHERE clause is useful when you want to delete records specified in the data table.

Note: when the WHERE condition is not used, all data will be deleted.

Example: delete all data in a table

[example 1] Delete all the data in the tb_courses_new table, and the input SQL statement and the execution result are shown below.

Mysql > DELETE FROM tb_courses_new;Query OK, 3 rows affected (0.12 sec) mysql > SELECT * FROM tb_courses_new;Empty set (0.00 sec) Thank you for reading! After reading the above, do you have a general idea of how mysql deletes all the data in the data table? I hope the content of the article will be helpful to all of you. If you want to know more about the relevant articles, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.