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Explain the two constraints, check and foreign key in SQL along with an example for each. Give the syntax. CHECK constraint - CHECK constraint specifies an expression which
What is Specialization? Specialization: Specialization permits you to describe new types of information (new structural types or latest domains of information), although reusin
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
I have a small project that contains 3 deliverable s. I have done the first one and I would like you to help me with second one
Define Boyce codd normal form A relation schema R is in BCNF with respect to a set F of functional dependencies if, for all functional dependencies in F + of the form.α ->β.
Which component is not included in database environment ? A users component is not included in database environment.
Define Network DBMS The NDBMS is built primarily on a one-to-many relationship, but where a parent-child representation between the data items cannot be ensured. This may occur
List the string operations supported by SQL? 1) Pattern matching Operation 2) Concatenation 3) Extracting character strings 4) Converting among uppercase and lower cas
object oriented database
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