DB2 – Triggers This chapter describes triggers, their types, creation and dropping of the triggers. Introduction A trigger is a set of actions, which are performed for responding to an INSERT, UPDATE or DELETE operation on a specified table in the database. Triggers are stored in the database at once. They handle governance of data. […]

DB2 – Tables Tables are logical structure maintained by Database manager. In a table each vertical block called as column (Tuple) and each horizontal block called as row (Entity). The collection of data stored in the form of columns and rows is known as a table. In tables, each column has different data type. Tables […]

DB2 – Constraints This chapter describes various constraints in the database. Introduction To enforce database integrity, a set of rules is defined, called constraints. The constraints either permit or prohibit the values in the columns. In a Real time database activities, the data should be added with certain restrictions. For example, in a sales database, […]