define tuple variabletuple variables are used for
Define tuple variable?
Tuple variables are used for comparing two tuples in the same relation. The tuple variables are explained in the from clause by way of the as clause.
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q what are compound eyesarthropods have compound eyes made of several visual units called as ommatidia each ommatidium transmits visual information
q how is arthropod reproduction characterizedreproduction in beings of the phylum arthropoda is sexual with larval stage in some insects and
what is the use of rename operationrename operation is used to rename both relations and an attributesit uses the as clause taking the formold-name
q what are the kinds of fecundation that occur in arthropods what is the predominant kindin arthropods there are species having exterior fecundation
define tuple variabletuple variables are used for comparing two tuples in the same relation the tuple variables are explained in the from clause by
q how is fecundation done in insects internal or external is there copulation between insectsfecundation in insects is internal with
list the string operations supported by sql1 pattern matching operation2 concatenation3 extracting character strings4 converting among uppercase and
list the set operations of sql1 union2 intersect operation3 the except
what is the use of union and intersection operationunion the result of this operation contains all tuples that are either in r1 or in r2 or in both
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