list the string operations supported by sql1
List the string operations supported by SQL?
1) Pattern matching Operation
2) Concatenation
3) Extracting character strings
4) Converting among uppercase and lower case letters.
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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
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define tuple variabletuple variables are used for comparing two tuples in the same relation the tuple variables are explained in the from clause by
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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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what are aggregate functions and list the aggregate functions supported by sqlaggregate functions are functions that take a collection of values as
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