Before deleting a column in a table, first is need to connect the java application to the database. Java has its own API which JDBC API which uses JDBC drivers for database connections. Before JDBC, ODBC API was used but it was written in C which means it was platform-dependent. JDBC API provides the applications to JDBC connection and JDBC driver provides manager to driver connection.
Algorithm: Always remember these 7 thumb golden steps to deal with JDBC in order to deal with the database and between App(Main) class and connection class of it.
- Importing the database
- Registering the Java class
- Establishing a connection
- Creating a statement
- Executing the query
- Process the results
- Closing connection
Procedure: to delete a column in a table from the database created using JDBC is as follows:
Step 1: Loading “mysqlconnector.jar” in the program.
Step 2: Creating a database and adding a table with records
- Using MySQL
- Further 5 steps are demonstrated in the java program. (App class or Main class) of the Connection class.
Implementation: Java program using JDBC to delete a Column in a Table
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