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JDBC s result set metadata, expressed as the java.sql.ResultSetMetaData interface, is a set of structured data that can be used to get information about the types and properties of the columns in a ResultSet object. It is very easy to create a ResultSetMetaData object. The following code fragment creates a ResultSet object rs, and then uses rs to create a ResultSetMetaData object rsMetadata, and finally uses rsMetadata to find out how many columns rs has: ResultSet rs = null; Statement stmt = null; Connection conn = null; ResultSetMetaData rsmd = null; String query = "SELECT id, name, photo FROM

fadeTo()

Connection conn = null; Statement stmt = null; try { // get a Connection object conn = getConnection(); stmt = conn.createStatement(); // Prepare a statement to update a record String sql = "UPDATE employee_table "+ "SET last_name='mary taylor' WHERE badge_number = '5555'"; // Execute the insert statement int updateCount = stmt.executeUpdate(sql); // updateCount contains the number of updated rows } catch (SQLException e) { // update failed // handle the exception } finally { // close database/JDBC resources such as // ResultSet(s), Statement(s), and Connection(s) }

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You can delete all the rows in a table by using SQL s DELETE statement. This example deletes all the rows from a database table called employee_table: Connection conn = null; Statement stmt = null; try { // get a Connection object conn = getConnection(); stmt = conn.createStatement(); // use SQL DELETE String tableName = "employee_table"; String sql = "DELETE FROM " + tableName; // Execute deletion stmt.executeUpdate(sql); } catch (SQLException e) { // deletion failed // handle the exception } finally { // close database/JDBC resources such as // ResultSet(s), Statement(s), and Connection(s) }

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This method adjusts the opacity of the selected elements. .fadeTo(speed, opacity, callback) speed decides the duration of the animation. It can be specified in terms of the predefined strings fast, normal, and slow, or in milliseconds. The higher the number of milliseconds, the longer the animation takes. opacity is the number between 0 and 1 for deciding the opacity of the selected element at the end of the animation. A value of 0 means the selected element will be invisible, 1 means it will appear sharp, and 0.5 means the selected element will appear dim. callback is the function that is fired on completion of the animation. In the jQuery code that fades out the image after scrolling, we can see that when the image is clicked, it moves to the right and stops at a distance of 600px from the left side of the browser window. On reaching the right side, the image slowly vanishes, as its opacity is set to 0.

To count all the rows for a table, you can use the following SQL command: SELECT COUNT(*) from <table-name> This example gets the number of rows in a table using this SQL statement: ResultSet rs = null; Statement stmt = null; Connection conn = null; int rowCount = -1; // nonexistent value try { // get a Connection object conn = getConnection(); // Select the number of rows in the table stmt = conn.createStatement(); rs = stmt.executeQuery("SELECT COUNT(*) FROM employee_table"); // Get the number of rows from the result set if (rs.next()) { rowcount = rs.getInt(1); } else { // error: could not get the number of rows } if (rsCount == -1) { // error: could not get the number of rows } } catch (SQLException e) { // counting rows failed // handle the exception } finally { // close database/JDBC resources such as // ResultSet(s), Statement(s), and Connection(s) }

It is possible to insert binary data with a Statement object (you can convert your binary data into a stream of String objects and then insert it using a Statement object), but it is much easier (and recommended) to insert binary data using PreparedStatement, which extends the Statement interface. The following example inserts binary data into a table: ResultSet rs = null; Statement stmt = null; Connection conn = null; try { // get a Connection object conn = getConnection();

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