Can a multivalued attribute be a primary key
WebHand: Follow the "General Wash” instructions. Fill a sink or tub with cool water, then add a few drops of a delicate detergent. Wait five minutes, then move the fabric through the water to dislodge any remaining dirt particles. Drain the … WebNov 4, 2015 · 1 Answer Sorted by: 1 Don't use comma separated values as one of the fields in a composite primary key. When you do this, you are really creating a table that is not in First Normal Form, even though it may appear to be 1NF to the DBMS. First Normal Form was devised way back when the relational model was brand new.
Can a multivalued attribute be a primary key
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WebAug 1, 2024 · Although there are many different types of keys to choose from in a set of data, relatively few will actually make it to your finished diagram. Composite Keys In general, keys can be single-attribute (unary) or multi-attribute (n-ary). A composite key requires more than one attribute. WebJun 8, 2024 · At 25mm, this Fishers Finery silk pillowcase is one of the heaviest we tested, with a thick and durable, yet still very soft, feel. Our testers loved the way this pillowcase felt on their skin and looked on their bed, and they even noted that their hair looked less frizzy than usual in the morning. Plus, the pillowcase (which has a side ...
WebSep 18, 2012 · It is possible to have a Composite attribute as a Primary key but Multivalued attribute cannot be taken as a Primary key. Because Multivalued Attribute is taken as an abnormality and it is resolved by making another entity of that attribute. Share Improve this answer Follow answered Dec 27, 2015 at 9:15 Yasir Janjua 23 7 Add a …
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