State True/False
| 1. | Dr. Edgar F. Codd proposed a set of rules that were intended to define the important characteristics and capabilities of any relational system. |
| 2. | Codd’s Logical Data Independence rule states that user operations and application programs should be independent of any changes in the logical structure of base tables provided they involve no loss information. |
| 3. | The entire field of RDBMS has its origin in Dr. E.F. Codd’s paper. |
| 4. | ISBL has no aggregate operators for example, average, mean and so on. |
| 5. | ISBL has no facilities for insertion, deletion or modification of tuples. |
| 6. | QUEL is a tuple relational calculus language of a relational database system INGRESS (Interactive Graphics and Retrieval System). |
| 7. | QUEL supports relational ... |
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