Question: What is ResultSet object in Java?

A ResultSet object is a table of data representing a database result set, which is usually generated by executing a statement that queries the database. For example, the CoffeeTables.

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.

What is the use of ResultSet object in JDBC?

A ResultSet object maintains a cursor that points to the current row in the result set. The term “result set” refers to the row and column data contained in a ResultSet object. Navigational methods − Used to move the cursor around.

How do you create a ResultSet object in Java?

Example of Scrollable ResultSet

  1. import java.sql.*;
  2. class FetchRecord{
  3. public static void main(String args[])throws Exception{
  4. Class.forName(“oracle.jdbc.driver.OracleDriver”);
  5. Connection con=DriverManager.getConnection(“jdbc:oracle:thin:@localhost:1521:xe”,”system”,”oracle”);
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What does the ResultSet object maintain?

A ResultSet object maintains a cursor pointing to its current row of data. Initially the cursor is positioned before the first row. … A default ResultSet object is not updatable and has a cursor that moves forward only. Thus, you can iterate through it only once and only from the first row to the last row.

What are the types of ResultSet?

There are 3 basic types of ResultSet.

  • Forward-only. As name suggest, this type can only move forward and are non-scrollable.
  • Scroll-insensitive. This type is scrollable which means the cursor can move in any direction. …
  • Scroll-sensitive. …
  • Forward-only. …
  • Scroll-insensitive. …
  • Scroll-sensitive.

What are the different types of ResultSet?

ResultSet Types

  • Forward Only (ResultSet. TYPE_FORWARD_ONLY) …
  • Scroll Insensitive (ResultSet.TYPE_SCROLL_INSENSITIVE. Scroll Insensitive ResultSet can scroll in both forward and backward directions. …
  • Scroll Sensitive (ResultSet.TYPE_SCROLL_SENSITIVE)

What is the difference between ResultSet and RowSet?

RowSet characteristics are as follows: it is a disconnected, serializable version of a JDBC ResultSet.

Java JDBC – Difference Between Row Set and Result Set.

RowSet ResultSet
A Row Set object can be serialized. It cannot be serialized.
You can pass a Row Set object over the network. ResultSet object cannot be passed other over the network.

Is ResultSet empty Java?

The JDBC ResultSet doesn’t provide any isEmpty(), length() or size() method to check if its empty or not. Hence, when a Java programmer needs to determine if ResultSet is empty or not, it just calls the next() method and if next() returns false it means ResultSet is empty.

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Why ResultSet next is false?

Iterating the ResultSet

To iterate the ResultSet you use its next() method. The next() method returns true if the ResultSet has a next record, and moves the ResultSet to point to the next record. If there were no more records, next() returns false, and you can no longer.

How can I get ResultSet size?

Simply iterate on ResultSet object and increment rowCount to obtain size of ResultSet object in java. rowCount = rs. getRow();

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 is RS next () in Java?

The next() method of the ResultSet interface moves the pointer of the current (ResultSet) object to the next row, from the current position. Statement stmt = con. createStatement(); ResultSet rs = stmt. … And on calling the next() method for the second time the result set cursor will be moved to the 2nd row.

Which of the following is a type of ResultSet object?

Based on the concurrency there are two types of ResultSet object. CONCUR_READ_ONLY: The ResultSet is read-only, this is the default concurrency type. CONCUR_UPDATABLE: We can use the ResultSet update method to update the rows data.

What is ResultSet in JDBC with example?

A ResultSet object is a table of data representing a database result set, which is usually generated by executing a statement that queries the database. For example, the CoffeeTables. viewTable method creates a ResultSet , rs , when it executes the query through the Statement object, stmt .

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How many result sets available with the JDBC?

There are two types of result sets namely, forward only and, bidirectional.