The following node is available in the Open Source KNIME predictive analytics and data mining platform version 2.7.1. Discover over 1000 other nodes, as well as enterprise functionality at http://knime.com.

Database Delete

Deletes data rows in the database based on the selected columns from the input table. All selected column names need to exactly match the column names inside the database. Only the rows matching the values of the selected column will be deleted.
The output table contains an additional column with the number of rows affected by the DELETE statement. A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution A value of -2 -- indicates that the command was processed successfully but that the number of rows affected is unknown.
Make sure you have your vendor-specific database driver registered in the KNIME preference page (section Database Driver). By default, the sun.jdbc.odbc.JdbcOdbcDriver (Windows and Linux) is only available.

Dialog Options

Settings
Database Driver
Enter the database driver here; it is a Java class (including the package path), for example: sun.jdbc.odbc.JdbcOdbcDriver Additional driver can be registered via KNIME's preference page (Database Driver).
Database URL
Enter the database name here, for example: jdbc:odbc:database_name or jdbc:mysql://host:port/database_name
Workflow Credentials
If checked, the credentials (user and password) are used as defined on the workflow. The credential name links to the specified user and password. Those can be replaced or edit using the 'Workflow Credentials' menu available in the workflow context menu.
User Name
Your log-in user name for the database.
Password
Your log-in password for the database. Note, the password is de- and encrypted before handling it internally and is not stored inside the settings.
Table Name
Enter the name of the table in which rows should be deleted.
Column Selection
WHERE columns
Select all columns used for the WHERE clause of the DELETE statement; those column values need to match the corresponding value in the database in order to run the delete.
Advanced
Batch Size
Enter a number greater than 0 for the number of rows deleted in one batch job; 1 means on row at a time.

Ports

Input Ports
0 Table with data rows to be deleted in the database
Output Ports
0 Input table with additional column providing number of affected rows in the database.
This node is contained in KNIME Base Nodes provided by KNIME GmbH, Konstanz, Germany.