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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'
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Design a database for an airline.The database must keep track of customers and their reservations,flights and their status, seat assignment on individual flights and, the schedule
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Explain the components of Database System in details.
Let consider the given partial relation EMP. Let us make some sub-queries for them EMPNO ENAME JOB SAL DEPTNO 7566
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