Will truncate release space?

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how do you login to mysql using unix shell? : Sql dba

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What is Difference between StoredProcedure and function?

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What are properties of the transaction?

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how is myisam table stored? : Sql dba

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Can you inner join the same table?

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What is meant by truncate in sql?

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How do you write an inner join query?

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What are the advantages of pl sql?

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Which is better join or subquery?

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SELECT emp_num, years, SUM(salary) FROM sales UNION ALL SELECT emp_id, SUM(takehomepay) FROM marketing What error is present in the sample code above? 1. Queries being combined with the UNION ALL statement are not allowed to have SELECT lists with a different number of expressions. 2. You are not allowed to use aggregate functions within two queries joined by a UNION ALL statement. 3. The UNION ALL statement incorrectly combines the "years" result from the first query with the "SUM (takehomepay)" result from the second query. 4. Unless the UNION ALL statement is replaced with a UNION statement, the queries will return duplicates. 5. The "emp_id" column from the second query must be renamed (or aliased) as "emp_num" so that it corresponds to the column name from the first query. Otherwise, the queries will not execute.

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How do you truncate?

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