What is updatable ResultSet in Java?

An updatable ResultSet object allows us to update a column value, insert column values and delete a row. Here the code snippet that makes a scrollable and updatable result set object.

How do I create an updatable ResultSet?

Updatable ResultSet Example

  1. Load the JDBC driver, using the forName(String className) API method of the Class. …
  2. Create a Connection to the database. …
  3. Create a Statement, using the createStatement() API method of the Connection.

What is scrollable and updatable ResultSet in Java?

A scrollable updatable result set maintains a cursor which can both scroll and update rows. Derby only supports scrollable insensitive result sets. To create a scrollable insensitive result set which is updatable, the statement has to be created with concurrency mode ResultSet. CONCUR_UPDATABLE and type ResultSet.

How ResultSet and updatable ResultSet is different from each other?

TYPE_SCROLL_INSENSITIVE result set does not see any changes made by other transactions or other elements of the same transaction. ResultSet. TYPE_SCROLL_SENSITIVE result sets, on the other hand, see all updates to data made by other elements of the same transaction. Inserts and deletes may or may not be visible.

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What is scrollable ResultSet?

JDBC provides two types of result sets that allow you to scroll in either direction or to move the cursor to a particular row. Derby supports one of these types: scrollable insensitive result sets ( ResultSet. TYPE_SCROLL_INSENSITIVE ). When you use a result set of type of type ResultSet.

What is updatable ResultSet?

An updatable ResultSet object allows us to update a column value, insert column values and delete a row. Here the code snippet that makes a scrollable and updatable result set object. PreparedStatement stmt = conn.

What happens if you call deleteRow on a updatable ResultSet object?

What happens if you call deleteRow() on a ResultSet object? a. The row you are positioned on is deleted from the ResultSet, but not from the database.

What is the difference between statement PreparedStatement and CallableStatement?

1) Statement – Used to execute normal SQL queries. 2) PreparedStatement – Used to execute dynamic or parameterized SQL queries. 3) CallableStatement – Used to execute the stored procedures.

How do I print result sets?

* * @param rs The ResultSet to print */ public static void printResultSet(ResultSet rs) { printResultSet(rs, DEFAULT_MAX_TEXT_COL_WIDTH); } /** * Overloaded method to print rows of a * ResultSet to standard out using maxStringColWidth * to limit the width of text columns.

What are types of ResultSet?

There are two types of result sets namely, forward only and, bidirectional. Forward only ResultSet: The ResultSet object whose cursor moves only in one direction is known as forward only ResultSet. By default, JDBC result sets are forward-only result sets.

Are results updatable?

A forward only updatable result set maintains a cursor which can only move in one direction (forward), and also update rows. A scrollable updatable result set maintains a cursor which can both scroll and update rows. Updatable result set can be used to insert rows to the table, by using ResultSet.

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What is true about getConnection () method?

The getConnection(String url, Properties info) method of Java DriverManager class attempts to establish a connection to the database by using the given database url. The appropriate driver from the set of registered JDBC drivers is selected. Properties are implementation-defined as to which value will take precedence.

Which type of JDBC driver is the fastest one?

Which type of JDBC driver is the fastest one? JDBC Net pure Java driver(Type 4) is the fastest driver because it converts the JDBC calls into vendor specific protocol calls and it directly interacts with the database.

What is difference between scrollable and non scrollable ResultSet?

The main difference between scrollable and non scrollable cursors in DB2 is that scrollable cursors are used to move randomly through the result set while non-scrollable cursors are used to move sequentially forward through the result set. … A cursor can process a single row, but it can hold multiple rows at a time.

What is scrollable ResultSet in hibernate?

ScrollableResults is like a cursor . An important feature of ScrollableResults is that it allows accessing ith object in the current row of results, without initializing any other results in the row through get(int i) function. It also allows moving back and forth the result set using next() and previous() function.

What is a ResultSet in Java?

A ResultSet is a Java object that contains the results of executing an SQL query. In other words, it contains the rows that satisfy the conditions of the query. The data stored in a ResultSet object is retrieved through a set of get methods that allows access to the various columns of the current row.

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