Informatics Practices
Assertion. Single row functions when applied on a column in a table, yield multiple values equal to number of rows in the table.
Reason. Single row functions work with individual rows and yield values accordingly.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
SQL Queries
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation
When a single row function is applied to a column in a table, it produces output for each row. Therefore, if there are n rows in the table, the single row function will yield n values, one for each row, because single row functions work with individual rows of a table.
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Assertion. Multi-row functions when applied on a column in a table, yield values which are not equal to number of rows in the table.
Reason. Multiple-rows functions do not work with all the rows in the table.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion. Multiple rows functions when applied on a column in a table, yield values which are not equal to number of rows in the table.
Reason. The multi-row functions work with data of multiple rows at a time and return aggregated value.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.