The JDBC statement is used to execute queries against the database. Let us study JDBC Statement by create table example.
Example:
JDBCTest.java
import java.sql.Connection; import java.sql.Statement; import com.w3schools.util.JDBCUtil; /** * This class is used to create a table in DB. * @author w3schools */ public class JDBCTest { public static void main(String args[]){ Connection conn = null; Statement statement = null; String query = "create table EMPLOYEE(" + "EMPLOYEE_ID NUMBER(5) NOT NULL, " + "NAME VARCHAR(20) NOT NULL, " + "SALARY NUMBER(10) NOT NULL, " + "PRIMARY KEY (EMPLOYEE_ID) )"; try{ //get connection conn = JDBCUtil.getConnection(); //create statement statement = conn.createStatement(); //execute query statement.execute(query); //close connection statement.close(); conn.close(); System.out.println("Table created successfully."); }catch(Exception e){ e.printStackTrace(); } } } |
JDBCUtil.java
import java.sql.Connection; import java.sql.DriverManager; /** * This is a utility class for JDBC connection. * @author w3schools */ public class JDBCUtil { //JDBC and database properties. private static final String DB_DRIVER = "oracle.jdbc.driver.OracleDriver"; private static final String DB_URL = "jdbc:oracle:thin:@localhost:1521:XE"; private static final String DB_USERNAME = "system"; private static final String DB_PASSWORD = "oracle"; public static Connection getConnection(){ Connection conn = null; try{ //Register the JDBC driver Class.forName(DB_DRIVER); //Open the connection conn = DriverManager. getConnection(DB_URL, DB_USERNAME, DB_PASSWORD); if(conn != null){ System.out.println("Successfully connected."); }else{ System.out.println("Failed to connect."); } }catch(Exception e){ e.printStackTrace(); } return conn; } } |
Output:
Successfully connected.
Table created successfully. |
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