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init.ora and SPfile both contain information about DB parameters. The database cannot start without an INIT.ORA but can start without an SPfile. An SPfile cannot be edited directly , but one can be configured via the pfile (init.ora) Init.ora is saved in ascii text format whereas the SPfile is saved in a binary format. If both files exist , the database reads the SPfile first before processing the init.ora. Oracle Guru's step in and correct if necessary .......... :) , Lekarshi

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Q: What is the use of spfile and init.ora in oracle?
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