what is foreign keya relation schema r1 derived
What is foreign key?
A relation schema r1 derived from an ER schema may contain among its attributes the primary key of another relation schema r2.this attribute is known as a foreign key from r1 referencing r2.
Expected delivery within 24 Hours
explain the effect of cutting speedincrease in cutting speed improves the surface finish due to the continuous reduction in built up edge the curve a
define query languagea query is a statement requesting the retrieval of information the portion of dml that includes information retrieval is known
write short notes on schema diagrama database schema along with primary key and foreign key dependencies can be depicted pictorially by schema
q what is the clitellum of earthtworms and where it is locatedthe clitellum is a special region of the annelid constituted by rings metameres with
what is foreign keya relation schema r1 derived from an er schema may contain among its attributes the primary key of another relation schema r2this
q concerning the occurrence of separated sexes how are the beings of the phylum annelida classifiedthese beings may be dioecious the majority of
q is the embryonic development in earthworms indirect or directthe embryonic development is direct because in earthworms there is no larval stageq
q what is the ecological role of earthwormsearthworms have an important ecological role as they eat decomposing organic material they also dig
q into which classes is the phylum annelida dividedthe phylum is divided into three classes hirudineans eg leeches oligochaetes for example
1958320
Questions Asked
3,689
Active Tutors
1412556
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Question: Which of the following is correct regarding Eisenmenger syndrome? It is found in infants and is a consequence of early shunting of blood from the left
Provide an explanation for how you arrived at your hypothesis. A plant will grow more when it receives more sunlight because higher rates
Question: What is one of the unique things about red wolves in NC? Question options: They have become adapted to humans
Question: Which is the major mechanism of atherosclerosis development at vascular branch points?
Question: Why is it so important in conservation biology to empower women? Need Assignment Help?
Question: In Baha, LaPaz Bay wildlife adventure area, what research are scientists conducting with whale sharks?
Why does the GI tract have a plexus in the muscularis and nerves in the mucosa? What physiological functions of the tract are supported