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A super key is an attribute or set of attributes used to recognize the records uniquely in a relation.
For instance, in the Relation PERSON defines earlier PERSON_ID is a super key since PERSON_ID is unique for every person. Likewise (PERSON_ID, AGE) and (PERSON_ID, NAME) are also super keys of the relation PERSON as their combination is also unique for each record.
What is the full form of DDL? DDL is stand for Data Definition Language.
What is a database graph? The partial ordering implies that the set D may now be viewed as a directed acyclic graph, known as a database graph.
Package classes and associations into models Programs are made of separate physical units which could be edited, imported, complied or otherwise manipulated. The careful part
What are the Requirements of algorithm designer Algorithm designer should: i) Select proper algorithm so as to minimize implementation cost ii) Find most appropriate d
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
sy bcs project of hospital managment system
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
What are the advantages of Logical Databases? It offers a simple-to-use selection screens. You can change the pre-generated selection screen to your needs. It offers check f
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