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What is object containment? References among objects can be used to model dissimilar real-world concepts.
What are the two types of errors? The two types of errors are: a) Logical error b) System error
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
lock and types of lock
Explain the Relational Completeness Codd described the term relational completeness to consider to a language that is complete with respect to first-order predicate calculus ex
Consider the relations: PROJECT(proj#,proj_name,chief_architect) EMPLOYEE(emp#,emp_name) ASSIGNED(proj#,emp#) Use relational algebra to express the subsequent queries: (i) Get
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
Meaningful use refers to the use of certified EHR technology to "enhance quality, efficiency, and reduce health disparities
Surgeons identified by doctor ID (DOCID) operate on patients identified by patient ID (PATID) in operating theaters identified by room numbers (ROOMNO). Each surgeon can operate on
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