Problem:
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LRM-00108: invalid positional parameter value 'sysdba'
Solution:
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You have to use below syntax:
expdp \'/ as sysdba\'
example:
expdp \'/ as sysdba\' DIRECTORY= EXPDP_DIR DUMPFILE=NECO.dmp LOGFILE=expdpNECO.log schemas=NECO exclude=STATISTICS content=ALL parallel=8
