My sql statement select avg(salary) from emp yields inaccurate results. Why?
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For unmatched rows returned from an outer join, the column values in the other table are set to null e.g If A OUTER JOIN B returns some unmatched rows from A, the corresponding column values in B will be set to null. What can be done so that a null value is not displayed for these columns?
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What is the physical storage length of date data type?
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I need to view the number of tables existing under one particular Owner. Is it possible? If so, pl give the SQL query for this?