Entity instances containing multivalued attributes. When searching a multivalued attribute, a DBMS must search each value in the attribute, most likely scanning the contents of the attribute sequentially. A sequential search is the slowest type of search available. In addition, how many values ...
We describe an algorithm to test whether a multivalued dependency is implied by a set of functional and join dependencies. The worst case running time of the algorithm is O ( nm ), where n is the length of the input and m is the number of the attributes in the universe. We also ...
AND attributes::ports::usb > 0 AND attributes::ports::hdmi > 0; In the example above, the double-colon (::) provides the path to the specific attribute we are interested in. In this case, we are looking for televisions (category_id 1) that have one or more USB and HDMI ports. In...
Can I use if statement in a table valued function? Can I use LEN or DATALENGTH in a WHERE clause? Can I use OUTER JOIN on 2 columns at the same time? Can row_number() work in UNION STATEMENTS ? Can someone explain just exactly why xp_cmdshell is such a massive risk?! Can SQL ...
3. The main task carried out in the ___ is to remove repeating attributes to separate tables. a) First Normal Form b) Second Normal Form c) Third Normal Form d) Fourth Normal Form View Answer advertisement 4. Which of the normal form is based on multivalued dependencies? a) First ...
Can I use if statement in a table valued function? Can I use LEN or DATALENGTH in a WHERE clause? Can I use OUTER JOIN on 2 columns at the same time? Can row_number() work in UNION STATEMENTS ? Can someone explain just exactly why xp_cmdshell is such a massive risk?! Can SQL...