Full Answer
What is the return type of execute update method?
Likewise, what is the return type of execute update method? The executeUpdate() method returns the number of rows affected by the SQL statement (an INSERT typically affects one row, but an UPDATE or DELETE statement can affect more). If executeUpdate() returns without throwing an error, the call to System. out.
What does it mean when statement executeupdate () returns-1?
- Stack Overflow What does it mean when Statement.executeUpdate () returns -1? Bookmark this question. Show activity on this post. A query that works in management studio and in the executeUpdate makes that same executeUpdate return -1, which is undefined in any documentation we can find. Its supposed to return only the rowcount or 0.
What does the method getupdatecount return?
When execute returns false, the method getUpdateCount returns an int. If this number is greater than or equal to zero, it indicates the update count returned by the statement. If it is -1, it indicates that there are no more results.
Does executeupdate return the number of affected rows?
The JDBC standard states that the executeUpdate method returns a row count or 0. For an SQL statement that can have an update count, such as an INSERT, UPDATE, DELETE, or MERGE statement, the returned value is the number of affected rows.
What is the return value of the execute () method when an SQL SELECT statement is executed and there are no rows corresponding to the query?
The ExecuteReader Method will return the result set of a SELECT . This method is to be used when you're querying for a bunch of results, such as rows from a table, view, whatever. The ExecuteScalar Method will return a single value in the first row, first column from a SELECT statement.Nov 24, 2010
What is the return type of the executeQuery () method 1 point?
ResultSet executeQuery(String SQL)− Returns a ResultSet object. Use this method when you expect to get a result set, as you would with a SELECT statement.
What type of value is returned by the executeQuery () method of Statement interface?
executeQuery(): This method is used to execute statements that returns tabular data (example select). It returns an object of the class ResultSet.Mar 20, 2019
What are the different types of statements available in JDBC?
There are three different kinds of statements:Statement : Used to implement simple SQL statements with no parameters.PreparedStatement : (Extends Statement .) Used for precompiling SQL statements that might contain input parameters. ... CallableStatement: (Extends PreparedStatement .)
What is the return type of executeQuery () method int ResultSet array void?
Whereas the execute( ) and executeUpdate( ) methods discussed in previous sections return primitive data types -- a boolean and int , respectively -- the method normally used with a SELECT statement, executeQuery( ) , returns a ResultSet object.
What is the return type of ExecuteNonQuery () method?
ExecuteNonQuery() returns number of rows affected(ex: 2 rows updated), so return type of ExecuteNonQuery is Integer. ExecuteScalar() is used to retrieve a single value from database, so return type of ExecuteScalar is Object.Apr 14, 2015
What is the return type of execute () executeQuery () and executeUpdate ()?
executeUpdate() : This method is used for execution of DML statement(INSERT, UPDATE and DELETE) which is return int value, count of the affected rows. executeQuery() : This method is used to retrieve data from database using SELECT query.May 18, 2013
What is the difference between executeQuery () and executeUpdate ()?
executeQuery() command used for getting the data from database whereas executeUpdate() command used for insert,update,delete or execute() command used forany kind of operations.
What type of value is returned by the execute update () method of Statement interface?
Description: This method is used for execution of DML statement(INSERT, UPDATE and DELETE) which is return int value, count of the affected rows.Oct 5, 2021
Which type of SQL statement returns a result set?
SQL SELECT statementThe SQL SELECT statement returns a result set of records, from one or more tables. A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used data manipulation language (DML) command.
What are the types of ResultSet in JDBC?
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.Mar 20, 2019
What are different type of three execute methods?
Implementation: Once the PreparedStatement object is created, there are three ways to execute it: execute(): This returns a boolean value and executes a static SQL statement that is present in the prepared statement object. executeQuery(): Returns a ResultSet from the current prepared statement.Jul 9, 2021
What is the return value of a SQL statement?
For an SQL statement that can have an update count, such as an INSERT, UPDATE, or DELETE statement, the returned value is the number of affected rows. It can be: A positive number, if a positive number of rows are affected by the operation, and the operation is not a mass delete on a segmented table space.
Why does a call return a value of -1?
For a DB2 CALL statement, a value of -1 is returned, because the DB2 database server cannot determine the number of affected rows. Calls to getUpdateCount or getMoreResults for a CALL statement also return -1. For any other SQL statement, a value of -1 is returned.
Does Java have pre and post conditions?
Java doesn't have pre and post conditions. A JDBC driver could return a random number and there was no way to stop it. If it's important to know why this happens, run the statement against different database until you have tried all execution paths (i.e. one where the IF returns false and one where it returns true ).
