java database connectivity - jdbc part-2

Working with JDBCWorking with JDBCBy

CHITRAKANT BANCHHOR

ReferencesReferences

ConnectionConnection

StatementStatement

JDBC InterfacesJDBC Interfaces

StatementStatement

DatabaseMetaDataDatabaseMetaData

Connection InterfaceConnection Interface

Transaction processingTransaction processingCreate objects for

executing SQL statementsCreate objects for

executing SQL statements

methods for

Transaction processingTransaction processing

Create objects forexecuting stored

procedures

Create objects forexecuting stored

procedures

Create objects forexecuting SQL statements

Create objects forexecuting SQL statements

It can not directly be created in code; instead, the Connection interface is created by theDriver.connect() method.

createStatement()createStatement()

public Statement createStatementcreateStatement( )( ) throws SQLExceptionpublic Statement createStatementcreateStatement( )( ) throws SQLException

This method creates a Statement object associated with this Connection session.

public Statement createStatementcreateStatement( )( ) throws SQLException

public Statement createStatementcreateStatement ((intint resultSetTyperesultSetType,, intint resultSetConcurresultSetConcur

))throws SQLException

public Statement createStatementcreateStatement ((intint resultSetTyperesultSetType,, intint resultSetConcurresultSetConcur

))throws SQLException

prepareStatementprepareStatement

public PreparedStatement prepareStatementprepareStatement((String sqlsql

)) throws SQLException

public PreparedStatement prepareStatementprepareStatement((String sqlsql

)) throws SQLException

This method provides a PreparedStatement object to be associated with this Connection session.

public PreparedStatement prepareStatementprepareStatement((String sqlsql

)) throws SQLException

public PreparedStatement prepareStatementprepareStatement ((String sqlsql,,int resultSetTyperesultSetType,,int resultSetConcurresultSetConcur

)) throws SQLException

public PreparedStatement prepareStatementprepareStatement ((String sqlsql,,int resultSetTyperesultSetType,,int resultSetConcurresultSetConcur

)) throws SQLException

The StatementStatement Interface

• The Connection object connects to the database.

• To execute SQL statements and get results back from the database, wemust use the Statement object.

Statement object creationStatement object creation

It can not be created directlyIt can not be created directly

It is created by the method of theConnection object

It is created by the method of theConnection object

It is created by the method of theConnection object

It is created by the method of theConnection object

The createStatement() methodreturns a Statement object as a

return value

The createStatement() methodreturns a Statement object as a

return value

execution methods used with a Statement objectexecution methods used with a Statement object

1. It allows us to execute the Statement when we do notknow if it is a query or an update.

2. It may return multiple results.

3. Use getResultSet to retrieve the ResultSet.

boolean executeexecute(

String Sql)

Executes the SQL string and returns a singleResultSet object.Executes the SQL string and returns a singleResultSet object.

Executes a SQL string, which must be anINSERT,UPDATE, DELETE, or a statement thatdoesn’t return anything.

Executes a SQL string, which must be anINSERT,UPDATE, DELETE, or a statement thatdoesn’t return anything.

ResultSet executeQueryexecuteQuery(

String Sql)

int executeUpdateexecuteUpdate(

String Sql)

Example:Example: SelectSelect

Example: InsertExample: Insert

Example: DeleteExample: Delete

Example: Create TableExample: Create Table -- 11

Example: Create TableExample: Create Table -- 22

JDBC withJDBC with MySqlMySql

Required SoftwareRequired Software

MySqlMySql connector with Tomcatconnector with Tomcat

• Copy in Tomcat’s lib folder

Create Table :Create Table : MySqlMySql

Delete Table:Delete Table: MySqlMySql

Inserting values inInserting values in MySQLMySQL database tabledatabase table

Select:Select: MySqlMySql

Thank You!Thank You!Thank You!Thank You!