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Describe substring comparison in SQL. For the relation Person (name, address), write a SQL query that retrieves the names of people whose name starts along with ‘A' and address contains ‘Bangalore'?
SUBSTR is used to extract a set of characters from a string through specifying the character beginning position and end position and length of characters to be fetched.
example substr('hello',2,3) will return 'ell' Select name from Person where name like ‘A%' and address = ‘Bangalore'
At its most essential level the DBMS architecture can be divide into two parts: the back end and the front end. The back end is responsible for managing the physical database an
Explain the difference between the three storage types - volatile, non volatile and stable. Ans: Volatile storage: if storage media loses data while power goes off,
what is natural join?
E-R model uses this symbol to represent weak entity set ? A Doubly outlined rectangle symbol is used to represent weak entity set.
Explain degree of relation? Degree of a Relation - The degree or arity of a relation is the number of attributes n of its relation schema.
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please i request for your assistance in developing a case-based online phone repair
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