Delete all Data from Table MySQL - (MySQL Practicles)
In MySQL, you can delete all data from a table using the DELETE statement. The DELETE statement removes all rows from a table, but it does not delete the table structure, indexes, or constraints. In this tutorial, we'll cover how to delete all data from a MySQL table.
Syntax
The syntax for deleting all data from a MySQL table is as follows:
DELETE FROM table_name;
Example
Let's say we have a table called "users" with the following data:
| id | name | |
|---|---|---|
| 1 | John | john@example.com |
| 2 | Sarah | sarah@example.com |
| 3 | Bob | bob@example.com |
To delete all data from the "users" table, we can use the following SQL statement:
DELETE FROM users;
This will delete all rows from the "users" table, so the table will be empty.
Output
When we execute the SQL statement above, there will be no output returned. However, if we query the table again using the SELECT statement, we will get an empty result set:
SELECT * FROM users;
| id | name |
|---|
Explanation
In the example above, we used the DELETE statement to delete all data from the "users" table. The statement removes all rows from the table, leaving the table structure in place.
Use
By deleting all data from a table, you can start fresh and load new data into the table. This is useful if you need to reset a table's data for testing purposes or if you need to delete all data in preparation for new data.
Important Points
- When you delete all data from a table, the table structure remains intact.
- Deleting all data from a table can be useful for resetting data for testing purposes or loading new data into the table.
- Be careful when deleting all data from a table as you cannot undo this operation.
Summary
In this tutorial, we covered how to delete all data from a MySQL table using the DELETE statement. We discussed the syntax, example, output, explanation, use, and important points of deleting all data from a table in MySQL. With this knowledge, you can now delete all data from a MySQL table and reset the table's data for testing purposes or to load new data.