Mysql delete all rows

I need to delete all rows from a table but when I add a new row, I want the primary key I which has an auto increment, to start again from respectively from 1. Delete all records in a table of. How to delete all rows in a MySQL or Oracle table. Therefore, use the latter. If you omit the WHERE clause, the DELETE statement will delete all rows in the table.

Besides deleting data from a table, the DELETE statement returns the number of rows deleted. To delete data from multiple tables using a single DELETE statement, you use the DELETE JOIN statement which we will cover in the next tutorial. The following code block has a generic SQL syntax of the DELETE command to delete data from a MySQL table. You can specify any condition using the WHERE clause. The conditions in the optional WHERE clause identify which rows to delete.

With no WHERE clause, all rows are deleted. It is specified as described in Section 13. Summary: in this tutorial, you will learn various ways to delete duplicate rows in MySQL. In the previous tutorial, we have shown you how to find duplicate values in a table. Once the duplicates rows are identifie you may want to delete them to clean up your data.

DELETE FROM `table_name` tells MySQL server to remove rows from the table. If the WHERE clause is not used in the DELETE query, then all the rows in a given table will be deleted. In some cases, this can be much faster than DELETE or even TRUNCATE TABLE. Usage ndb_ delete _ all -c connection_string tbl_name-d db_name.

This deletes all rows from the table named tbl_name in the database named db_name. It is exactly equivalent to executing TRUNCATE db_name. If not accompanied by any condition about which rows are to be remove MySQL DELETE statement removes all records or rows from a table.

This MySQL DELETE example would delete all records from the contacts table where the last_name is Johnson. You may wish to check for the number of rows that will be deleted. Regards, Ravi K The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. In this article, we show how to delete all rows of a MySQL table using PHP. In other words, we are completely clearing all records from the table and wiping it blank.

In this tutorial provide the example of how to delete all records from table using mysql JDBC driver. If you are not the intended recipient, you should not. SQL DELETE Statement The DELETE statement is used to delete rows in a table. You specify which table to delete the records from, and if require you add a WHERE clause to specify which records to delete. Notice that if you omit the WHERE clause, all records will be deleted!

Basically, we completely clear all records from the table. The table and with all its columns and definitions still exists. However, all records in the table will be deleted. Question: I need to delete all of the data from an Oracle table. Also see my notes on different ways to delete large amounts of data rows delete large amounts of data from an Oracle table.

How do I delete every rows in a table? Here is the query to delete all rows with some condition. Steps involved in deleting a set of rows from a MySQL Table: The SQL statement DELETE is a DML statement.

DML stands for data Manipulation Language. This article describes how to delete a set of rows from a MySQL database table. Unless a filter using WHERE clause is specified the DELETE statement will delete all the rows from a specified table. It will be easy, when user delete multiple rows on a single click.

Java and J2EE developers, all examples are simple and easy to understan and well tested in our development environment. Yong Mook Kim, aka Mkyong.