منذ 10 سنه تقريبا
1) Commit and rollback are related to .......... A. data integrity B. data consistency C. data sharing D. data security 2) The transaction w...
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منذ 10 سنه تقريبا
1) A mechanism which ensures that simultaneous execution of more than one transaction does not lead to any database inconsistencies is calle...
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منذ 10 سنه تقريبا
1) In the ............, one transaction inserts a row in the table while the other transaction is half way through its browsing of table. A....
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منذ 10 سنه تقريبا
1) If the transaction is rolled back, all the database changes made inside the transaction are ...... A. made permanent B. made temporary C....
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منذ 10 سنه تقريبا
1) Which of the following is not a characteristic of a relational database model? A. Table B. Tree like structure C. Complex logical relatio...
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منذ 10 سنه تقريبا
1) ......keyword is used to eliminate the duplicates. A. distinct B. unique C. union D. intersect 2) ..........is a query that has another q...
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منذ 10 سنه تقريبا
1) What is a data integrity? A. It is the data contained in database that is non redundant. B. It is the data contained in database that is ...
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منذ 10 سنه تقريبا
1. Which of the following relational algebra operations do not require the participating tables to be union-compatible? A. Union B. Intersec...
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منذ 10 سنه تقريبا
1) DROP is a ................ statement in SQL. A. Query B. Embedded SQL C. DDL D. DCL 2) The keyword to eliminate duplicate rows from the q...
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