JDBC Tutorials - Herong's Tutorial Examples - v3.12, by Dr. Herong Yang
"DELETE FROM" Statements
This section describes how to delete existing data rows with DELETE statements.
DELETE statements are used less frequently in database applications. They are used only when you want to remove data rows from a table permanently. DELETE statements should include a WHERE clause to identify the data rows to be deleted.
DELETE statements should be executed with the executeUpdate() method. The Java tutorial program below shows you how to delete specific rows:
/* DeleteRows.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.sql.*; public class DeleteRows { public static void main(String [] args) { Connection con = null; try { con = DriverManager.getConnection( "jdbc:sqlserver://localhost\\SQLEXPRESS;" + "user=herong;password=T0pSecret;" + "database=AdventureWorks2019"); Statement sta = con.createStatement(); // deleting multiple rows int count = sta.executeUpdate( "DELETE FROM Herong.Customer WHERE CustomerID in (1, 3, 5, 7)"); System.out.println("Number of rows deleted: "+count); // getting the data back ResultSet res = sta.executeQuery( "SELECT * FROM Herong.Customer"); System.out.println("List of Customers: "); while (res.next()) { System.out.println( " "+res.getInt("CustomerID") + ", "+res.getString("FirstName") + ", "+res.getString("LastName") + ", "+res.getDate("ModifiedDate")); } res.close(); sta.close(); con.close(); } catch (Exception e) { e.printStackTrace(); } } }
The output confirms that 4 rows were deleted:
herong> java -cp .;mssql-jdbc-9.4.1.jre16.jar DeleteRows Number of rows deleted: 4 List of Customers: 2, Terri, Duffy, 2008-01-24 4, Rob, Walters, 2007-11-28 6, Jossef, Goldberg, 2013-12-16 8, Diane, Margheim, 2015-04-01 9, Gigi, Matthew, 2015-04-01 10, Michael, Raheem, 2015-04-01 11, Herong, Yang, 2015-04-01
Table of Contents
JDBC (Java Database Connectivity) Introduction
Installing and Running Java DB - Derby
Derby (Java DB) JDBC DataSource Objects
Java DB (Derby) - DML Statements
Java DB (Derby) - ResultSet Objects of Queries
Java DB (Derby) - PreparedStatement
MySQL JDBC Driver (MySQL Connector/J)
MySQL - Reference Implementation of JdbcRowSet
MySQL - JBDC CallableStatement
MySQL CLOB (Character Large Object) - TEXT
MySQL BLOB (Binary Large Object) - BLOB
Oracle Express Edition Installation on Windows
Oracle - Reference Implementation of JdbcRowSet
Oracle - JBDC CallableStatement
Oracle CLOB (Character Large Object) - TEXT
Oracle BLOB (Binary Large Object) - BLOB
Microsoft SQL Server Express Edition
Microsoft JDBC Driver for SQL Server
Microsoft JDBC Driver - Query Statements and Result Sets
Microsoft JDBC Driver - DatabaseMetaData Object
Microsoft JDBC Driver - DDL Statements
►Microsoft JDBC Driver - DML Statements
"INSERT INTO" Statements with INDENTITY Columns
SQL Server - PreparedStatement
SQL Server CLOB (Character Large Object) - TEXT
SQL Server BLOB (Binary Large Object) - BLOB
JDBC-ODBC Bridge Driver - sun.jdbc.odbc.JdbcOdbcDriver
JDBC-ODBC Bridge Driver - Flat Text Files
JDBC-ODBC Bridge Driver - MS Access
JDBC-ODBC Bridge Driver - MS SQL Server
Summary of JDBC Drivers and Database Servers