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Explain why an information gap exists in most organizations.
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when we login sql editor using username and password then it says this error "could not resolve service name" then what can we do at client side.( here thing is tnsnames.ora file is ok till yesterday and worked well, but now it giving error.)
Define a relation schema and a relation.
How do queries work in a database?
What are the different types of languages that are available in the dbms?
There are 100 datafiles, numbered from 1 to 100. File number 10 is deleted and it has 500 MB of data. The database is working in archive log mode. How can be the database recovered ? While doing recovery the archive logs applied are from nos 1 to 100, but 50 gets corrupted. What do we do? Can we proceed further? If so how?
Why is group-clause used?
What is difference between database and schema?
Define fragmentation.
What are the features of a database management system?
Where the Databases overall structure is maintained ?
How to export data from database and import into another?
Briefly describe an outer join.
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