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…
What is DatabaseMetaData?
DatabaseMetaData interface provides methods to get meta data of a database such as database product name, database product version, driver name, name of total number of tables, name of total number of views etc.
What is ResultSetMetaData in Java?
ResultSetMetaData is an interface in java. sql package of JDBC API which is used to get the metadata about a ResultSet object. This object will have all the meta data about a ResultSet object like schema name, table name, number of columns, column name, datatype of a column etc.
What does setAutoCommit false do?
What does setAutoCommit(false) do? Explanation: setAutoCommit(false) does not commit transaction automatically after each query. That saves a lot of time of the execution and hence improves performance.
Which packages contain the JDBC classes?
Which packages contain the JDBC classes
- java.jdbc and javax.jdbc.
- java.jdbc and java.jdbc.sql.
- ✅ java.sql and javax.sql.
- java.rdb and javax.rdb.
Why do we use ResultSetMetaData?
The metadata means data about data i.e. we can get further information from the data. If you have to get metadata of a table like total number of column, column name, column type etc. , ResultSetMetaData interface is useful because it provides methods to get metadata from the ResultSet object.
What is API in JDBC?
Java™ database connectivity (JDBC) is the JavaSoft specification of a standard application programming interface (API) that allows Java programs to access database management systems. The JDBC API consists of a set of interfaces and classes written in the Java programming language.
What is JDBC driver in Java?
A JDBC driver is a software component enabling a Java application to interact with a database. JDBC drivers are analogous to ODBC drivers, ADO.NET data providers, and OLE DB providers. To connect with individual databases, JDBC (the Java Database Connectivity API) requires drivers for each database.
What is setAutoCommit in JDBC?
By default, JDBC uses an operation mode called auto-commit. This means that every update to the database is immediately made permanent. setAutoCommit(false); // Disables auto-commit. If the auto-commit setting is changed in the middle of a transaction, any pending work is automatically committed.
What happens when autocommit is set on?
When autocommit is set on, a commit occurs automatically after every statement, except PREPARE and DESCRIBE. If autocommit is on and a cursor is opened, the DBMS does not issue a commit until the CLOSE cursor statement is executed, because cursors are logically a single statement.
