What is the role of JDBC DriverManager class?
The DriverManager class manages the registered drivers. It can be used to register and unregister drivers. It provides factory method that returns the instance of Connection.
What are the JDBC API components?
The java.sql package contains interfaces and classes for JDBC API. Interfaces: · Connection · Statement · PreparedStatement · ResultSet · ResultSetMetaData · DatabaseMetaData · CallableStatement etc. Classes: · DriverManager · Blob · Clob · Types · SQLException etc.
What are the steps to connect to a database in java?
· Registering the driver class · Creating connection · Creating statement · Executing queries · Closing connection
What is JDBC Driver?
JDBC Driver is a software component that enables java application to interact with the database. There are 4 types of JDBC drivers: 1. JDBC-ODBC bridge driver 2. Native-API driver (partially java driver)…
What are MySQL functions in PHP?
Creating a function In MySQL, Function can also be created. A function always returns a value using the return statement. The function can be used in SQL queries. Syntax CREATE…
What are the commands of MySQL?
MySQL command-line client commands This command allows us to connect with MySQL Server with a username and passwords using below syntax. mysql -u -p; If you want to connect with…
What is data type in MySQL?
A Data Type specifies a particular type of data, like integer, floating points, Boolean, etc. It also identifies the possible values for that type, the operations that can be performed…
What is PHP form handling?
We can create and use forms in PHP. To get form data, we need to use PHP superglobals $_GET and $_POST. The form request may be get or post. To…
What is constructor and destructor in PHP?
In object oriented programming terminology, constructor is a method defined inside a class that is called automatically at the time of creation of the object. Purpose of a constructor method…
What is inheritance explain in detail?
Inheritance is an important principle of object oriented programming methodology. Using this principle, relations between two classes can be defined. PHP supports inheritance in its object model. PHP uses extended…