Copy One Database Table to Another
In this section, you will learn to copy
one database table to another database table. That means we copy one table to a different table but it contains a similar type of field or column. These
tables aren’t in same database. Both the MySQL databases are different i.e. jdbc4
and jdbcMysql. The "jdbc4" database has "Copyemployee" table and
"jdbcMysql"
database also has a "Roseindia" table.
To copy the table you need to establish
the connection with the MySQL database (jdbcMysql). When the connection is established then sql statement
(“INSERT INTO Roseindia SELECT * FROM jdbc4.Copyemployee”) is executed and
rows get copied. Once the rows get copied then it will display a message - “number of row(s)
affected!”. Whenever any row is not copied then it shows a message
- “Don’t
add any row!”.
Syntax for copy
table:
“INSERT INTO <new_table_name>
SELECT * FROM <Database_name.old_table_name>
Here is the code of program:
import java.sql.*;
public class CopyOneDatabaseTableToAnother {
public static void main(String[] args) {
System.out.println("Copy data from one database table to another!");
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "jdbcMysql";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "root";
try {
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url+dbName,userName,password);
Statement st = conn.createStatement();
//Copy table
int rows = st.executeUpdate("INSERT INTO Roseinda SELECT *
FROM jdbc4.Copyemployee");
if (rows == 0){
System.out.println("Don't add any row!");
}
else{
System.out.println(rows + " row(s)affected.");
conn.close();
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
|
Download this program.
Table Name: Copyemployee(jdbc4)
| empId |
empName |
empSal |
| 8 |
AmarDeep |
10000 |
| 7 |
Noor |
50000 |
| 1 |
Vinod |
50000 |
| 2 |
Sushil |
80000 |
Table Name: Roseindia(jdbcMysql)
| empId |
empName |
empSal |
| 10 |
Suman saurabh |
19000 |
| 11 |
Ravi |
25000 |
Output of this program:
C:\vinod>javac CopyOneDatabaseTableToAnother.java
C:\vinod>java CopyOneDatabaseTableToAnother
Copy data from one database table to another!
4 row(s)affected.
C:\vinod> |
After copy table: Roseindia(jdbcMysql)
| empId |
empName |
empSal |
| 10 |
Suman saurabh |
19000 |
| 11 |
Ravi |
25000 |
| 8 |
AmarDeep |
10000 |
| 7 |
Noor |
50000 |
| 1 |
Vinod |
50000 |
| 2 |
Sushil |
80000 |
|
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