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What is Trigger? A trigger is a SQL procedure that initiates an action when an event (INSERT, DELETE or UPDATE) occurs. Triggers are kept in and managed by the DBMS. Triggers a
cardnality ratio for humanresource mangement system
er diagram on cosmetics.
Create centralized relational database using bottom up method. (a) Recognize a single un-normalized relation for the above scenario. (b) Recognize the primary key for
DML Precompiler All the DBMS have two basic sets of Languages - Data Definition Language (DDL) that have the set of commands needed to define the format of the data that is b
what is attribute is attribute inheritance in dbms?
The JOIN operation is applied on two relations. When we want to choose related tuples from two given relation join is used. The join operation need that both the joined relations m
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What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
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