ORA-30370: set operators are not supported in this context
Answer Posted / guest
Cause: A set operator such as UNION, UNION ALL, INTERSECT,
or MINUS was encountered in an unsupported context, such as
in a materialized view definition.
Action: Re-specify the expression to avoid the use of set
operators.
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When i am connect database through toad,one error occured. ORA-12514: TNS:listener does not currently know of service requested in connect descriptor. plz help me thanks advance.............
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