MCQOPTIONS
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MCQOPTIONS
This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Database knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one of the following deletes all the entries but keeps the structure of the relation. |
| A. | Delete from r where P; |
| B. | Delete from instructor where dept name= ’Finance’; |
| C. | Delete from instructor where salary between 13000 and 15000; |
| D. | Delete from instructor; |
| Answer» C. Delete from instructor where salary between 13000 and 15000; | |
| 2. |
A Delete command operates on ______ relation. |
| A. | One |
| B. | Two |
| C. | Several |
| D. | Null |
| Answer» B. Two | |