Why is ResultSet empty?
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.
What will happen if ResultSet () is not present in JDBC?
If you do not specify any ResultSet type, you will automatically get one that is TYPE_FORWARD_ONLY. The cursor can only move forward in the result set. The cursor can scroll forward and backward, and the result set is not sensitive to changes made by others to the database that occur after the result set was created.
Which method is used to fetch the result from database and assign it to ResultSet object?
The ResultSet interface declares getter methods (for example, getBoolean and getLong ) for retrieving column values from the current row. You can retrieve values using either the index number of the column or the alias or name of the column.
Which of the following methods is used to check whether ResultSet object contains records?
The next() method of the ResultSet interface moves the pointer of the current (ResultSet) object to the next row, from the current position. This method returns a boolean value specifying whether the ResultSet object contains more rows.
Is before first Java?
The beforeFirst() method of the ResultSet interface moves the pointer of the current (ResultSet) object to the default position (before first), from the current position. Statement stmt = con. createStatement(); ResultSet rs = stmt.
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.
Which of the following is not a JDBC exception?
The Statement interface cannot accept parameters. PreparedStatement: It represents the pre-compiled SQL statements that can be executed multiple times. CallableStatement: It is used to execute SQL stored procedures. QueryStatement: It is not supported by JDBC.
Which one is not a JDBC interface?
ConnectionPool is not a class of JDBC API. JDBC API consists of following interfaces and classes: DriverManager, Driver, Connection, Statement, ResultSet, SQLException.
How do I get a complete row from a ResultSet?
The getRow() method of the ResultSet interface retrieves the current row number/position of the ResultSet pointer. This method returns an integer value representing the current row number to which the ResultSet pointer points to.
What JDBC object is used to reference the rows returned by a query?
sql. ResultSet also an interface and is used to retrieve SQL select query results. A ResultSet object maintains a cursor pointing to its current row of data. Initially the cursor is positioned before the first row.
Which of the following is correct about JDBC?
Which of the following type of JDBC driver, uses database native protocol?…
|Q.||Which of the following is correct about JDBC?|
|A.||JDBC architecture decouples an abstraction from its implementation.|
|B.||JDBC follows a bridge design pattern.|