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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
Use a Set operator to create a list of academics who have written or co-written less than 5 papers and also have greater than 3 interests. List their academic number in the output.
what is Nested relational model? Explain with examples.
NEED ER DIAGRAM WITH MINIMUM ENTITY AND RELATIONSHIP of Hospital Management System
Consider the relation schemas as follows. works (person name, company name, salary); lives (person name, street, city); located in(company name, city); managers (person name
Benefits and limitations
case study
Define data conversion? Helpful to load data into temporary staging tables. Then can write SQL code to do much of data processing. SQL code is simpler and faster to write than
Data Replication "If a relation R has its copies kept at two or more sites, then it is considered replicated". But why do we replicate a relation? There are several advan
WHAT IS DBMS
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