Found 9326 Articles for Object Oriented Programming

Grouping related SQL statements into a batch and executing/submitting them at once is known as batch processing. The Statement interface provides methods to perform batch processing such as addBatch(), executeBatch(), clearBatch().Follow the steps given below to perform batch updates using the CallableStatement object:Register the driver class using the registerDriver() method of the DriverManager class. Pass the driver class name to it, as a parameter.Connect to the database using the getConnection() method of the DriverManager class. Passing URL (String), username (String), password (String) as parameters to it.Set the auto-commit to false using setAutoCommit() method of the Connection interface.Create a CallableStatement object ... Read More

The tag is used as a nested action for the and the tag to supply a date and time value for a value placeholder. If a null value is provided, the value is set to SQL NULL for the placeholder.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultValueValue of the date parameter to set (java.util.Date)NoBodytypeDATE (date only), TIME (time only), or TIMESTAMP (date and time)NoTIMESTAMPExampleTo start with basic concept, let us create a simple table Students table in the TEST database and create a few records in that table as follows −Step 1Open a Command Prompt and change ... Read More

Grouping related SQL statements into a batch and executing/submitting them at once is known as batch processing. The Statement interface provides methods to perform batch processing such as addBatch(), executeBatch(), clearBatch().Follow the steps given below to perform batch updates using the PreparedStatement object:Register the driver class using the registerDriver() method of the DriverManager class. Pass the driver class name to it, as a parameter.Connect to the database using the getConnection() method of the DriverManager class. Passing URL (String), username (String), password (String) as parameters to it.Set the auto-commit to false using setAutoCommit() method of the Connection interface.Create a PreparedStatement object ... Read More

The tag used as a nested action for the tag and the tag to supply a value for a value placeholder. If a null value is provided, the value is set to SQL NULL for the placeholder.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultValueValue of the parameter to setNoBodyExampleTo start with the basic concept, let us create an Employees table in the TEST database and create few records in that table as follows −Step 1Open a Command Prompt and change to the installation directory as follows −C:\> C:\>cd Program Files\MySQL\bin C:\Program Files\MySQL\bin>Step 2Login to the database as ... Read More

Grouping related SQL statements into a batch and executing/submitting them at once is known as batch processing. The Statement interface provides methods to perform batch processing such as addBatch(), executeBatch(), clearBatch().Follow the steps given below to perform batch updates using the Statement object:Register the driver class using the registerDriver() method of the DriverManager class. Pass the driver class name to it, as a parameter.Connect to the database using the getConnection() method of the DriverManager class. Passing URL (String), username (String), password (String) as parameters to it.Create a Statement object using the createStatement() method of the Connection interface.Set the auto-commit to ... Read More

Grouping related SQL statements into a batch and executing/submitting them at once is known as batch processing.While executing a set of statements one after other the execution switches from the database to program simultaneously.Using batch processing we can reduce this communication overhead and increase the performance of our Java application.For Example, if we have a table named Emp with the following description:+----------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+--------------+------+-----+---------+-------+ | Name | varchar(255) | YES | ... Read More

The tag executes an SQL statement that does not return data; for example, SQL INSERT, UPDATE, or DELETE statements.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultsqlSQL command to execute (should not return a ResultSet)NoBodydataSourceDatabase connection to use (overrides the default)NoDefault databasevarName of the variable to store the count of affected rowsNoNonescopeScope of the variable to store the count of affected rowsNoPageExampleTo start with basic concept, let us create a simple table Employees table in the TEST database and create few records in that table as follows −Step 1Open a Command Prompt and change to the installation directory as follows ... Read More

The tag executes an SQL statement that does not return data; for example, SQL INSERT, UPDATE, or DELETE statements.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultsqlSQL command to execute (should not return a ResultSet)NoBodydataSourceDatabase connection to use (overrides the default)NoDefault databasevarName of the variable to store the count of affected rowsNoNonescopeScope of the variable to store the count of affected rowsNoPageExampleTo start with basic concept, let us create a simple table Employees table in the TEST database and create few records in that table as follows −Step 1Open a Command Prompt and change to the installation directory as follows ... Read More

The tag executes an SQL statement that does not return data; for example, SQL INSERT, UPDATE, or DELETE statements.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultsqlSQL command to execute (should not return a ResultSet)NoBodydataSourceDatabase connection to use (overrides the default)NoDefault databasevarName of the variable to store the count of affected rowsNoNonescopeScope of the variable to store the count of affected rowsNoPageExampleTo start with basic concept, let us create a simple table Employees table in the TEST database and create few records in that table as follows −Step 1Open a Command Prompt and change to the installation directory as follows ... Read More

The tag executes an SQL SELECT statement and saves the result in a scoped variable.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultsqlSQL command to execute (should return a ResultSet)NoBodydataSourceDatabase connection to use (overrides the default)NoDefault databasemaxRowsMaximum number of results to store in the variableNoUnlimitedstartRowNumber of the row in the result at which to start recordingNo0varName of the variable to represent the databaseNoSet defaultscopeScope of variable to expose the result from the databaseNoPageExampleTo start with the basic concept, let us create an Employees table in the TEST database and create few records in that table as follows −Follow these steps ... Read More