JDBC Tutorials - Herong's Tutorial Examples - 3.10, by Dr. Herong Yang
Inserting CLOB Values with SQL INSERT Statements
This section describes how to insert CLOB values as string literals using SQL INSERT statements.
The simplest way to insert a character string into a CLOB column is to use a SQL INSERT statement and include the character string a SQL string literal in the statement as shown in this sample program:
/* OracleClobInsert.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.sql.*; public class OracleClobInsert { public static void main(String [] args) { Connection con = null; try { oracle.jdbc.pool.OracleDataSource ds = new oracle.jdbc.pool.OracleDataSource(); ds.setDriverType("thin"); ds.setServerName("localhost"); ds.setPortNumber(1521); ds.setDatabaseName("XE"); ds.setUser("Herong"); ds.setPassword("TopSecret"); con = ds.getConnection(); // Deleting the record for re-testing String subject = "Test on INSERT statement"; Statement sta = con.createStatement(); sta.executeUpdate("DELETE FROM Article WHERE Subject = '" +subject+"'"); // Inserting CLOB value with a regular insert statement sta = con.createStatement(); int count = sta.executeUpdate( "INSERT INTO Article" +" (ID, Subject, Body)" +" VALUES (1, '"+subject+"', 'A BLOB (Binary Large OBject) is" +" a large chunk of data which is stored in a database.')"); // Retrieving CLOB value with getString() ResultSet res = sta.executeQuery( "SELECT * FROM Article WHERE Subject = '"+subject+"'"); res.next(); System.out.println("The inserted record: "); System.out.println(" Subject = "+res.getString("Subject")); System.out.println(" Body = "+res.getString("Body")); res.close(); sta.close(); con.close(); } catch (Exception e) { e.printStackTrace(); } } }
Compilation and execution of this program is below. The output confirms that the character string value was correctly inserted into the CLOB column:
herong> Progra~1\java\jdk1.6.0_2\bin\java -cp .;\local\lib\ojdbc14.jar OracleClobInsert The inserted record: Subject = Test on INSERT statement Body = A BLOB (Binary Large OBject) is a large chunk of data which is stored in a database.
Using SQL string literals to insert CLOB values into database is not recommended, because quote characters (') in the CLOB values must be replaced with escape sequences ('').
Using PreparedStatement with setXXX() method is a much safer choice.
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
Overview of CLOB (Character Large Object)
Create Tables with CLOB Columns
►Inserting CLOB Values with SQL INSERT Statements
Inserting CLOB Values with setString() Method
Inserting CLOB Values with setCharacterStream() Method
Closing InputStream Too Early on setCharacterStream()
Retrieving CLOB Values with getString() Method
Retrieving CLOB Values with getCharacterStream() Method
Retrieving CLOB Values with getClob() Method
Inserting CLOB Values with setClob() Method
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
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