Programming Articles - Page 2622 of 3363

Whenever we execute SQL statements using the executeQuery() method, it returns a ResultSet object which holds the tabular data returned by the SELECT queries(in general).The ResultSet object contains a cursor/pointer which points to the current row. Initially this cursor is positioned before first row (default position).You can move the cursor of the ResultSet object to the next row from the current position, using the next() method of the ResultSet interface.rs.next()This method returns a boolean value specifying whether the ResultSet object contains more rows.If there are no rows next to its current position this method returns false, else it returns true.Let us create ... Read More

ResultSet objectCertain SQL queries (especially SELECT) returns tabular data, In JDBC the object of the java.sql.ResultSet interface holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).ResultSet Cursor/pointerThe ResultSet object has a cursor/pointer which points to the current row. Initially this cursor is positioned before first row.There are two types of result sets namely, forward only and, bidirectional. By default the ResultSet we get by the executeQuery() method is of the type forward only. Using this you can traverse/move the cursor only forward direction.Bidirectional ResultSetA bi-directional ResultSet ... Read More

When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ResultSet object has a cursor/pointer which points to the current row. Initially this cursor is positioned before first row.The isClosed() method of the ResultSet interface is used to determine whether the current ResultSet object is closed.rs.isclosed()CLOSE_CURSORS_AT_COMMITIf the holdability of the ResultSet object is set to this value. Whenever you commit/save ... Read More

When we execute certain SQL queries (SELECT query in general) they return tabular data. The java.sql.ResultSet interface represents such tabular data returned by the SQL statements i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which requires the database (executeQuery() method of the Statement interface in general). The ResultSet object has a cursor/pointer which points to the current row. Initially, this cursor is positioned before the first row. Java ResultSet isLast() Method The isLast() method of the ResultSet interface is used to determine whether the cursor is on the last row of the ... Read More

When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ResultSet object has a cursor/pointer which points to the current row. Initially this cursor is positioned before first row.The isBeforeFirst() method of the ResultSet interface is used to determine whether the cursor is at the default position of the ResultSet.rs.isBeforeFirst();This method returns an boolean this value is true, if the cursor is ... Read More

The ResultSet interface in Java is used to retrieve data from a database in a tabular form. The isAfterLast() method is one of the navigation methods in the ResultSet that helps in checking the position of the cursor. Specifically, isAfterLast() checks whether the cursor is positioned after the last row of the result set. Method Definition The isAfterLast() method of the ResultSet interface is used to determine whether the cursor is after the end of the ResultSet.This method returns a boolean this value is true, if the cursor is after the end of the ResultSet else, it returns false. ... Read More

The getSearchStringEscape() method of the DatabaseMetaData interface is used to get the that is used to escape the wildcard characters ('_' or, '%') by the underlying database.This method returns a string parameter representing the value that is used to escape wildcard charactersTo get the DatabaseMetaData object −Make sure your database is up and running.Register the driver using the registerDriver() method of the DriverManager class. Pass an object of the driver class corresponding to the underlying database.Get the connection object using the getConnection() method of the DriverManager class. Pass the URL the database and, user name, password of a user in the database, ... Read More

In this article, we will learn the DatabaseMetaData getTypeInfo() method in Java. The DatabaseMetaData.getTypeInfo() method in Java retrieves information about the supported data types in a database. What is getTypeInfo()? The getTypeInfo() method of the DatabaseMetaData interface returns a ResultSet containing information about all the data types supported by the database. Each row in this result set describes a single data type, including details such as its name, precision, case sensitivity, and whether it supports auto-increment. Syntax ResultSet info = metaData.getTypeInfo(); This method returns a ResultSet object describing the data types supported. This object holds values for the following details ... Read More

ResultSet holdability determines whether the ResultSet objects (cursors) should be closed or held open when a transaction (that contains the said cursor/ResultSet object) is committed using the commit() method of the Connection interface.The getResultSetHoldability() method of the DatabaseMetaData interface retrieves the default holdability for the ResultSet objects of the underlying database.This method returns an integer value representing the default ResultSet holdability, which will be either 1 or 2 where, 1 indicates the value HOLD_CURSORS_OVER_COMMIT. If the holdability of the ResultSet object is set to this value. Whenever you commit/save a transaction using the commit() method of the Connection interface, the ResultSet ... Read More

The getTableTypes() method of the DatabaseMetadata interface is used to find out the type of tables supported by the underlying database.This method returns a ResultSet object holding the names of table types in each row in String format, under the column TABLE_TYPE.To get the description DatabaseMetadata object.Make sure your database is up and running.Register the driver using the registerDriver() method of the DriverManager class. Pass an object of the driver class corresponding to the underlying database.Get the connection object using the getConnection() method of the DriverManager class. Pass the URL the database and, user name, password of a user in the database, ... Read More