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.)

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Explain the syntax of named procedure?

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What's the difference between star and snow flake schema?

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What is drivermanager getconnection?

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How do you maintain a database?

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What is unique key in dbms?

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What do you mean by entity type extension?

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What is the difference between case version and decode version?

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Discuss some of the techniques that can be used to tune operational performance.

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what do u mean by canvases and alerts?

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What are the differences between drop, truncate and delete commands?

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What is a data type in a database?

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