List out the difference between commit, rollback, and savepoint?
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Explain user account with reference to oracle.
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If I have a select statment which retrives 2 rows, & that rows have the same data in all the fields except the last field and I want to merge the 2 rows to be in 1 row with concatenating the last field which have the different data.... eg: the 1st row has these fields: A-B-C the second row has: A-B-X ........ i want to merge the two row to be in one row like ----> A- B- C,X
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SQLERRM is a a. Constraint b. Pre Defined Exception c. Pseduocolumn d. Constant e. None of Above.
What is an oracle user account?