JDBC for SQL Server - Herong's Tutorial Examples - v3.14, by 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
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
Using Connection Pool with JDBC
JDBC-ODBC Bridge Driver - sun.jdbc.odbc.JdbcOdbcDriver
JDBC-ODBC Bridge Driver - Flat Text Files
JDBC-ODBC Bridge Driver - MS Access