What is index example?

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What is nosql vs sql?

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Explain what is a field in a database and record in a database?

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Is a view faster than a stored procedure?

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What is case function?

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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.

3 Answers  

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Is a foreign key always unique?

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What is the difference between rollback and rollback to statements?

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How do I get sql certification?

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Can we use commit inside a trigger?

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1. Which is an aggregate function? a. Union b. like c. max d. Rank

1 Answers   Fintellix,

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select sal from emp group by sal

3 Answers   TCS,

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