java.sql(JDBC)

Batch processing is a technique of grouping multiple database operations and executing them together instead of executing each operation separately. In JDBC, batch processing can be performed using both Statement and PreparedStatement. It is especially useful when a large number of INSERT, UPDATE, or DELETE operations need to be performed. Batch processing can reduce communication […]

Batch updates using PreparedStatement allow multiple parameterized SQL operations to be grouped and executed together. The addBatch() method adds the current set of parameter values to the batch after assigning values using methods such as setInt(), setString(), and setDouble(). The executeBatch() method executes all the parameterized operations in the batch and returns an integer array

Batch updates in JDBC are used to execute multiple SQL statements as a single group or batch. The Statement interface provides the addBatch() method to add multiple INSERT, UPDATE, or DELETE statements to a batch. The executeBatch() method executes all the SQL statements in the batch and returns an integer array containing the number of

The ResultSet interface can be used to modify database records directly when it is created as an updatable ResultSet. Instead of executing a separate UPDATE SQL statement, methods such as updateInt(), updateString(), and updateDouble() can be used to change column values. The updateRow() method saves the modified values of the current row to the database.

A ResultSet stores the data returned by a SQL query and provides methods to retrieve values from each row. JDBC allows data to be accessed using either the column name or the column index. Column names make the program more readable, while column indices can be useful when processing columns dynamically. The column index starts

The ResultSet interface in JDBC is used to retrieve and navigate through the data returned by a SQL SELECT query. When a query is executed using executeQuery(), it returns a ResultSet object containing the retrieved rows. The next() method moves the cursor from one row to the next, while methods such as getInt(), getString(), and

The ResultSet interface in JDBC is used to store and retrieve the data returned by a SQL query. It represents the rows and columns of the result produced by a SELECT statement. A ResultSet maintains a cursor that points to the current row, and methods such as next(), previous(), first(), and last() are used to

Handling Query Results in JDBC means processing the data returned by a database after executing a SELECT query. The executeQuery() method returns a ResultSet object containing the retrieved records. The next() method is used to move through the records one row at a time, while getter methods retrieve column values. After processing the results, the

The PreparedStatement interface in JDBC is used to execute parameterized SQL queries. It uses the ? placeholder to represent values that are supplied at runtime. The setInt(), setString(), setDouble(), and other setter methods are used to assign values to parameters. PreparedStatement is safer and more efficient than Statement for repeated or dynamic SQL queries. Common

The Statement interface in JDBC is used to execute static SQL queries against a database. It is created using the createStatement() method of the Connection interface. The Statement interface can execute SQL commands such as SELECT, INSERT, UPDATE, and DELETE. It is mainly suitable when the SQL query does not require dynamic parameters. Common Methods