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What are the three classes of SQL expression?
SQL expression consists of three clauses:
Select
From
Where
Explain the term- signal-to-noise ratio A signal-to-noise ratio of 20 dB means that S/N = 100. As log2101 is around 6.658, the Shannon limit is around 19.975 kbps. The Nyquist
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
What are the uses of ODBC? Under what circumstances we use this technology? ODBC expose database capabilities within a standardized way to the application programmer by an ap
We have a new website where I need someone to 1: Inhabit the back end with all the recruitment agencies in the UK. I require someone who is not manually going to do this, but who w
What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types.
Describe the Composite Key Composite Key: Sometimes one key is not enough to uniquely recognize a row. E.g. in a single class Roll is enough to search a student, but in the w
Is it mandatory to declare all the tables in Report by the key word tables for all the tables that exist in the structure of LDB, and are being explained in the Database part of LD
Explain cursors in SQL? Cursors in SQL - An object used to store the output of a query for row-through-row processing through the application programs. Cursors are constructs
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
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