Getting Column Names from a database table in Java

Here we are providing you an example with code that retrieves all columns name in a specific database table. Sometimes, you need to know the number of columns and the names of the columns of the table, so you can retrieve it with the help of this example.

Getting Column Names from a database table in Java

Getting Column Names from a database table in Java

     

Here we are providing you an example with code that retrieves all columns name in a specific database table. Sometimes, you need to know the number of columns and the names of the columns of the table, so you can retrieve it with the help of this example. See detail information given below:

Description of program:

Create a class ColumnName. The name of the class should be such that the other person can easily understand what this program is going to do. Strictly follow the naming conventions of java. Now declare a static method inside which creates the connection with MySQL database through the JDBC driver. After establishing the connection then you get all columns name and number of columns of specified table with the help of some APIs and methods.

Description of code:

ResultSetMetaData:
This is an interface of java.sql package that can be used for getting information about types and properties of columns in a ResultSet object.

getColumnCount():
Above method retrieves number of columns (integer types data) in the ResultSet object.

getColumnName(int column):
This method returns columns name (string type data) from ResultSetMetaData object and takes integer type value.

Here is the code of program:

import java.sql.*;

public class ColumnName{
  public static void main(String[] args) {
  System.out.println("Getting Column Names Example!");
  Connection con = null;
  String url = "jdbc:mysql://localhost:3306/";
  String db = "jdbctutorial";
  String driver = "com.mysql.jdbc.Driver";
  String user = "root";
  String pass = "root";
  try{
  Class.forName(driver);
  con = DriverManager.getConnection(url+db, user, pass);
  try{
  Statement st = con.createStatement();
  ResultSet rs = st.executeQuery("SELECT * FROM employee6");
  ResultSetMetaData md = rs.getMetaData();
  int col = md.getColumnCount();
  System.out.println("Number of Column : "+ col);
  System.out.println("Columns Name: ");
  for (int i = 1; i <= col; i++){
  String col_name = md.getColumnName(i);
  System.out.println(col_name);
  }
  }
  catch (SQLException s){
  System.out.println("SQL statement is not executed!");
  }
  }
  catch (Exception e){
  e.printStackTrace();
  }
  }
}

Output of program:

C:\vinod\jdbc\jdbc-mysql>javac ColumnName.java

C:\vinod\jdbc\jdbc-mysql>java ColumnName
Getting Column Names Example!
Number of Column : 2
Columns Name:
Emp_code
Emp_name

Download this example.

Tutorials

  1. Mapping MySQL Data Types in Java
  2. Connecting to a MySQL Database in Java
  3. Creating a Database in MySQL
  4. Creating a Database Table
  5. Creating a MySQL Database Table to store Java Types
  6. Description of Database Table
  7. Deleting a Table from Database
  8. Retrieving Tables from a Database
  9. Inserting values in MySQL database table
  10. Retrieving All Rows from a Database Table
  11. Adding a New Column Name in Database Table
  12. Change Column Name of a Table
  13. Make Unique Column in Database Table
  14. Remove Unique Column in Database Table
  15. Arrange a Column of Database Table
  16. Arrange a Column of Database Table
  17. Sum of Column in a Database Table
  18. Deleting All Rows from a Database Table
  19. Delete a Specific Row from a Database Table
  20. Delete a Column from a Database Table
  21. Join tables in the specific database
  22. Join tables with the NATURAL LEFT JOIN operation
  23. Join tables with the NATURAL RIGHT JOIN operation
  24. Cross Join Tables in a Specific Database
  25. Prepared Statement Set Object
  26. Statement Batch Update
  27. Prepared Statement With Batch Update
  28. Select Records Using Prepared Statement
  29. Update Records using Prepared Statement
  30. Inserting Records using the Prepared Statement
  31. Count Records using the Prepared Statement
  32. Deleting Records using the Prepared Statement
  33. Using the Prepared Statement Twice
  34. Set Data Types by using Prepared Statement
  35. Set byte, short and long data types by using the Prepared Statement
  36. Prepared Statement Set Big Decimal
  37. Set Date by using the Prepared Statement
  38. Set Time by using the Prepared Statement
  39. Set Timestamp by using the Prepared Statement
  40. Copy Table in a MySQL Database