What does pragma mean?

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What are functions in sql?

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What does the argument [or replace] do?

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what is difference between decode and case function?

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Explain aggregate functions are available there in sql?

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What is a left inner join?

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how to connect oracle in unix prompt?

4 Answers   Polaris,

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What is meant by temporal data?

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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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Why are sql stored procedures used?

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What is the difference between partitioning and sharding?

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Explain 3 basic parts of a trigger.

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