Java Executables and JDBC Characteristics Quiz

Java Executables

• Java can be used to write standalone executables, applets, and servlets.

JDBC Interface

• JDBC provides a java.sql package interface for Java programs to access databases.

JDBC Mechanism

• A characteristic of JDBC mechanism is that it is a two-tier and three-tier architecture.

JDBC Architecture

• The JDBC DriverManager provides the application-to-JDBC Manager connection.

executeUpdate Method

• The executeUpdate method returns an integer representing the number of rows affected by the execution of the SQL statement.

Prepared Statement vs Regular Statement

• A Prepared Statement is different from a regular Statement in that it is precompiled, allowing for more efficient execution of SQL queries.

ResultSet in Java Code

• The purpose of 'ResultSet result = statement.executeQuery(sql)' is to execute a SQL query and store the result in a ResultSet object.

Class.forName("com.mysql.jdbc.Driver")

• The 'Class.forName("com.mysql.jdbc.Driver")' method loads the JDBC driver for MySQL.

ResultSet Types

• TYPE_SCROLL_INSENSITIVE allows the cursor to move through the dataset in both forward and backward directions.
• The default ResultSet type in Java is TYPE_FORWARD_ONLY.

###Checking ResultSet Type Support

• The method 'databaseMetaData.supportsResultSetType()' can be used to check if a specific ResultSet type is supported by the database.

###Changes to Underlying Data

• If there are changes to the underlying data while moving through the dataset using TYPE_SCROLL_INSENSITIVE, the changes will not be reflected in the ResultSet.