What is DatabaseMetaData and explain in details?
Generally, Data about data is known as metadata. The DatabaseMetaData interface provides methods to get information about the database you have connected with like, database name, database driver version, maximum column length etc… Following are some methods of DatabaseMetaData class. Method. Description.
Which object do you ask for DatabaseMetaData?
You obtain the DatabaseMetaData object from a Connection , like this: DatabaseMetaData databaseMetaData = connection. getMetaData(); Once you have obtained this DatabaseMetaData instance, you can call methods on it to obtain the meta data about the database.
What are the functions of the the JDBC DatabaseMetaData interface?
Interface DatabaseMetaData. Comprehensive information about the database as a whole. This interface is implemented by driver vendors to let users know the capabilities of a Database Management System (DBMS) in combination with the driver based on JDBCTM technology (“JDBC driver”) that is used with it.
Which of the following syntaxes is used to get DatabaseMetaData object?
How to get the object of DatabaseMetaData: The getMetaData() method of Connection interface returns the object of DatabaseMetaData. Syntax: public DatabaseMetaData getMetaData()throws SQLException.
What is addBatch JDBC?
The method returns true if your JDBC driver supports this feature. The addBatch() method of Statement, PreparedStatement, and CallableStatement is used to add individual statements to the batch. The executeBatch() is used to start the execution of all the statements grouped together.
How do I view metadata in SQL?
There are 2 simple ways:
- Option 1. sp_help ‘schema.table_name’
- Option 2. SELECT * FROM INFORMATION_SCHEMA.columns c WHERE c.table_name = ‘table_name’
What is getMetaData in Java?
The getMetaData() method of ResultSet interface retrieves the ResultSetMetaData object of the current ResultSet. This method returns a ResultSetMetaData object which holds the description of this ResultSet object’s columns.
What is the use of ResultSetMetaData interface?
Interface ResultSetMetaData. An object that can be used to get information about the types and properties of the columns in a ResultSet object.
What is executeBatch?
The executeBatch() is used to start the execution of all the statements grouped together. The executeBatch() returns an array of integers, and each element of the array represents the update count for the respective update statement.
What is Batchupdate?
A batch update is a set of multiple update statements that is submitted to the database for processing as a batch. Sending multiple update statements to the database together as a unit can, in some situations, be much more efficient than sending each update statement separately.
What is SQL metadata?
Metadata, as most of you may already know, provides the basic and relevant information about the data. Metadata functions in SQL Server return information about the database, database objects, database files, file groups etc. in SQL Server.
What does getMetaData return?
getMetaData() returns a DatabaseMetaData object that contains metadata about the database to which this Connection object is connected.
What is ResultSet meta data explain with example?
The ResultSetMetaData provides information about the obtained ResultSet object like, the number of columns, names of the columns, datatypes of the columns, name of the table etc… Following are some methods of ResultSetMetaData class. Method. Description. getColumnCount()