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To eliminate duplicate rows (distinct operator)
Example:
SELECT DISTINCT DEPTNO FROM EMP;
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 need web security expert , website management Project Description: i want professional for the below . website management server management database management
Explain Deadlock detection and recovery Deadlock Detection - A deadlock is said to take place when there is a circular chain of transaction, every waiting for the release of a
Write a short note on oracle Instance? Oracle Instances: An instance is the (executed) Oracle software and the memory they use. It is the instance which manipulates the data s
why older data models are being replaced by new data models.
Define DBMS? DBMS: database management system (DBMS) is computer software designed for the reason of supervision databases based on a variety of data models.
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
What is the use of sub queries? A sub query is a select-from-where expression that is nested with in another query. A common use of sub queries is to do tests for set membershi
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
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