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Which of the following is not a restriction for a table to be a relation?(a) The cells of the table must contain a single value(b) All of the entries in any column must be of the same kind(c) The columns must be ordered(d) No two rows in a table may be identicalI got this question during an interview.The query is from Normalization topic in chapter Planning Oracle Applications of Oracle |
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Answer» RIGHT answer is (C) The columns must be ordered The EXPLANATION: To FORMAT the columns differently, assign a UNIQUE alias to each column within the SELECT command itself (do not use the ALIAS clause of the COLUMN command) and enter a COLUMN command for each column’s alias. |
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