Java CRUD Mechanism with SQL Server Database

Q7M1 – SC Dudy Fathan Ali S.Kom

Java CRUD Mechanismwith SQL Server Database

Q7M1

Dudy Fathan Ali, S.Kom (DFA)2017

CEP - CCITFakultas Teknik Universitas Indonesia

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http://bit.ly/4sc5-repo

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Create a Database in SQL Server


To follow this lesson, you need to create a database based on the following schematic database diagram:

Database name: GoShop

Configuring JDBC-ODBC Data Source Name


You need to perform the following steps to create a Data Source Name:o Select the required driver for a DSNo Specifying the connection details for a DSNo Testing the created DSN



Selecting the required driver for a DSN

o Open Administrative Tools in Control Panel

o Double-click the ODBC Data Sources Icon




o Select System DSN Tabo Add New System Data Sources




o In the Create New Data Source dialog box, select SQL Server option

o Click the Finish button



Specifying the connection details for a DSN

o Type the name of the Data Source in the Name text box

o Select required SQL Server name from the Server drop-down list

o Click the Next button




o To indicate how the SQL Server should authenticate a login ID, select With SQL Server authentication.. option

o Type the username in the Login ID textbox and the password in the Password textbox





o Select the name of the database from drop-down listbox





o Click the Finish button



Testing the created DSN

o To test the created DSN for the connection with database, click the Test Data Source button

Using JDBC API


o The JDBC API classes and interfaces are available in the java.sql and the javax.sql packages.

o The commonly used classes and interfaces in the JDBC API are:o DriverManager class: Loads the driver for a database. o Driver interface: Represents a database driver. All JDBC driver classes

must implement the Driver interface. o Connection interface: Enables you to establish a connection between a

Java application and a database. o Statement interface: Enables you to execute SQL statements. o ResultSet interface: Represents the information retrieved from a

database. o SQLException class: Provides information about the exceptions that

occur while interacting with databases.

Using JDBC API


o The steps to create JDBC application are:o Load a drivero Connect to a databaseo Create and execute JDBC statementso Handle SQL exceptions

Connecting to a Database


Code Example [Koneksi.java]:

Creating & Executing JDBC Statements


Code Example [ProductCRUD.java]:

Inserting Rows in a Table



Querying a Table



Updating Rows in a Table



Deleting Rows in a Table

Querying & Modifying Data Using PreparedStatement Object


o The PreparedStatement interface is derived from the Statement interface and is available in the java.sql package.

o The PreparedStatement object:o Allows you to pass runtime parameters to the SQL statements to query

and modify the data in a table.o Is compiled and prepared only once by JDBC. The future invocation of

the PreparedStatement object does not recompile the SQL statements.

o Helps in reducing the load on the database server and thus improving the performance of the application.



o Methods of the PreparedStatement Interfaceo The PreparedStatement interface inherits the following

methods to execute SQL statements from the Statement interface: o ResultSet executeQuery(): Executes a SELECT statements and

returns the result in a ResultSet object. o int executeUpdate(): Executes an SQL statement, INSERT,

UPDATE, or DELETE and returns the count of the rows affected. o boolean execute(): Executes an SQL statement and returns a

boolean value.



o The prepareStatement() method of the Connection object is used to submit parameterized query to a database.

o The SQL statement can contain ‘?’ symbol as placeholders that can be replaced by input parameters at runtime.

o The value of each ‘?’ parameter is set by calling an appropriate setXXX() method, where XXX is the data type of the parameter.

stat = con.prepareStatement("SELECT * FROM authors WHERE au_id = ?");

stat.setString(1,"1001"); ResultSet result=stat.executeQuery();



Retrieving Rows



Inserting Rows



Updating Rows



Deleting Rows


Thank You!Dudy Fathan Ali, S.Kom

[email protected]

mailto:[email protected]

Java CRUD Mechanism with SQL Server Database

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