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Explain P command in the respect of QBE?
P: It is the command in which is used to print (logically display) the value of the attribute in whose cell it is written. To shown the whole relation, P has to be written in each field or through placing a single P in the column headed through the relation name also displays entire relation.
Replication : It is definite as a copy of a relation. Every replica is stored at a dissimilar site. The alternative to replication is to store only single copy of a relation which
Question 1: Define the term business intelligence tools? Briefly explain how the data from one end gets transformed into information at the other end? Definition Exp
It can be easily defined as: The database must not have any unmatched foreign key values. The term "unmatched foreign key value" means a foreign key value for which there doe
what is correlation in nested query
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
What is Index? An index is a physical structure having pointers to the data. Indices are created in an existing table to locate rows more quickly and efficiently. It is possibl
Ask Write the SQL code that will create the table structure for a table named EMP _1. This table is a subset of the EMPLOYEE table. The basic EMP_1 table structure is summarized in
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