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Gaps in sequence values can happen when:
- A rollback happens that is when a statement changes are not accepted.
- When the system crashes
- When a sequence is used in another table.
what is cascading? what is rollback cascading? please explain in detail
A database administrator''s responsibilities and data contents
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
Using Column aliases Example: To print column names as NAME and ANNUAL SALARY SELECT ENAME "NAME", SAL*12 "ANNUAL SALARY" FROM EMP;
What do you mean by Correlated subquery? Subqueries, or nested queries, are used to bring back a set of rows to be used by the parent query. Depending on how the subquery is writ
Differentiate between horizontal & mixed horizontal fragmentation?
Briefly describe concurrency execution? Lock - based protocols Locks There are several modes in which a data item may be locked in this section we restrict our attention
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In this practical assignment, we will run through a complete database application development cycle, starting with the schema design, from an initial data import to database applic
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
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