SQL:
====
ALL datas:
----------
select * from databaseName.tableName;

Particular column:
-------------------
select Id,Name from databaseName.tableName;

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Step 1:
=======

url= "jdbc:db_type://ipaddress:port/db_name"
username="root"
password="admin"
query="select * from world.city"

step 2: [Load the driver]
======
		Class.forName("com.mysql.jdbc.Driver");
		
Step 3: [Create a connection]
=======
		Connection con = DriverManager.getConnection(url,username,password);
		
Step 4: [create statement object for query]
=======
		Statement st = con.createStatement();
		
Step 5: [execute the query]
=======
		ResultSet rs = st.executeQuery(query);