SQL Query to return N rows from dual

Question

I want to write a SQL query which accepts a bind variable (say :NUM) and its output consists of one column & :NUM number of rows, each row having its row number. i.e. if we

Answer 1

Another way is to use an XQuery range expression, e.g.:

select column_value from xmltable(:a||' to '||:b);

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This solution is quite flexible, e.g.:

select column_value from xmltable('5 to 10, 15 to 20');

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