MCQOPTIONS
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MCQOPTIONS
| 1. |
What does a query processor do in semantic checking? |
| A. | Checks whether all the relations mentioned under the FROM clause in the SQL statement are from the database the user is referenced. |
| B. | Checks all the attribute values and also checks whether they exist in a particular relation that is specified in the query. It checks all the attribute values that are mentioned in the SELECT and WHERE clauses of the SQL statement. |
| C. | Verifies whether the types of attributes are compatible with the values used for the attributes. |
| D. | All of these. |
| Answer» E. | |