Java Resultset Back To First. Hi I dont know of this issue is present in your actual code but note that ResultSetwasNull must be called after a getter method has been called. Note that you must first call one of the getter methods on a column to try to read its value and then call the method wasNull to see if the value read was SQL NULL.
By default ResultSet object can be moved forward only and it is not updatable. Best to use ResultSetnext along with the do while syntax for this. The check for any results call ResultSetnext moves the cursor to the first row so use the do while syntax to process that row while continuing to process remaining rows returned by the loop.
The dataset contains the data from the.
ResultSets have a cursor which points to the current data table row. It returns True if the operation is successful else False. 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. You can move the cursor of the ResultSet object to the first row from the current position using the first method of the ResultSet interface.