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Aggregate functions
Example: Find the total number of employees.
SELECT COUNT (*) FROM EMP;
Example: //Find the minimum, maximum and average salaries of employees of department D1//.
SELECT MIN(SAL), MAX (SAL), AVG(SAL) FROM EMP
WHERE DEPTNO = 'D1' ;
Differentiate OO development from structured development. Structured approach of problem solving is based upon the idea of decomposition of system into subsystem. In this appro
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Explain the difference between optimistic locking and pessimistic locking. Optimistic locking supposes no transaction conflict will occur and deals with the consequences if it
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