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What is a Built-in
A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in object oriented systems.
gyan gurukul is a software company that provides software related solution.
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
Write a short note on QBE? Stands for "Query By Example." QBE is a feature involved along with various database applications which gives user-friendly techniques of running da
I am going to develop a web site to present decision tree structure. For this, I want a web application with AJAX technology to connect the database and prepare the decision tree's
How do I use strap on?#
1. Create a subroutine that does the remote blast on the file protein.fa. 2. Pass that returned files from the blast to another subroutine that parses the output and sends it to
Saving Derived Attributes to Avoid Re-computation As discussed, "redundancy means duplication of exact data". But, if multiple copies of same data are present in the system,
Explain What is Relation? A database relation is a predefined row or column format for storing information in a relational database. Relations are equal to tables.
What are aggregate functions? And list the aggregate functions supported by SQL? Aggregate functions are functions that take a collection of values as input and return a one va
How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
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