The JDBC API was modeled after ODBC, but, because JDBC is a Java API, it offers a natural Java interface for working with SQL. JDBC is needed to provide a "pure Java" solution for application development.
JDBC Core Components
Today, there are five types of JDBC drivers in use:
Two major components of JDBC are Connection Pooling and Data Sources.
DriverManager is a static class in the Java™ 2 Plaform, Standard Edition (J2SE) and Java SE Development Kit (JDK). DriverManager manages the set of Java Database Connectivity (JDBC) drivers that are available for an application to use. Applications can use multiple JDBC drivers concurrently if necessary.
The method returns true if your JDBC driver supports this feature. The addBatch() method of Statement, PreparedStatement, and CallableStatement is used to add individual statements to the batch. The executeBatch() is used to start the execution of all the statements grouped together.
The DriverManager class acts as an interface between user and drivers. It keeps track of the drivers that are available and handles establishing a connection between a database and the appropriate driver.
The Java packages which contain JDBC classes and interfaces is Java. SQL.
JDBCTM is a JavaTM API for executing SQL statements. (As a point of interest, JDBC is a trademarked name and is not an acronym; nevertheless, JDBC is often thought of as standing for "Java Database Connectivity".) It consists of a set of classes and interfaces written in the Java programming language.
What is, in terms of JDBC, a DataSource? A. A DataSource is the basic service for managing a set of JDBC drivers. B. A DataSource is the Java representation of a physical data source.
The standard way to obtain a Connection object is to call the method DriverManager. getConnection() method that accepts a String contains the database connection URL. It is a static and synchronized method.
The JDBC-ODBC Bridge allows applications written in the Java programming language to use the JDBC API with many existing ODBC drivers. The Bridge is itself a driver based on JDBC technology ("JDBC driver") that is defined in the class sun. ... odbc.
ConnectionPool is not a class of JDBC API. JDBC API consists of following interfaces and classes: DriverManager, Driver, Connection, Statement, ResultSet, SQLException.
The representation of a savepoint, which is a point within the current transaction that can be referenced from the Connection. rollback method. When a transaction is rolled back to a savepoint all changes made after that savepoint are undone. Savepoints can be either named or unnamed.
JDBCJava 8Object Oriented ProgrammingProgramming. A rollback operation undoes all the changes done by the current transaction i.e. If you call a rollBack() method of the Connection interface, all the modifications are reverted until the last commit.Con.rollback()
Transaction Management in JDBC ACID stands for Atomicity, Consistency, isolation and durability. ... Isolation ensures that transaction is isolated from other transaction. Durability means once a transaction has been committed, it will remain so, even in the event of errors, power loss etc.
A scrollable ResultSet is one which allows us to retrieve the data in forward direction as well as backward direction but no updations are allowed. In order to make the non-scrollable ResultSet as scrollable ResultSet we must use the following createStatement() method which is present in Connection interface.
PreparedStatement interface is used to execute parameterized query - JDBC. Q.
A ResultSet is a Java object that contains the results of executing an SQL query. In other words, it contains the rows that satisfy the conditions of the query. The data stored in a ResultSet object is retrieved through a set of get methods that allows access to the various columns of the current row.
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There are 3 basic types of ResultSet.
Fundamental Steps in JDBC
ResultSet interface represents the result set of a database query. ... A ResultSet object maintains a cursor that points to the current row in the result set. The term "result set" refers to the row and column data contained in a ResultSet object.
To return result sets from a Java method Ensure that the Java method is declared as public and static in a public class. For each result set you expect the method to return, ensure that the method has a parameter of type java. sql. ... ResultSet and then assign it to one of the ResultSet[] parameters.
For instance, if it is used to retrieve a numeric type, getString converts the numeric value to a Java String object, and the value has to be converted back to a numeric type before it can be operated on as a number.
Step by Step: Making a Simple CRUD Application Using Java Servlet/JSP