What do you understand by case manipulation functions?

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what is meant by tuning and tk proof?

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How do you declare a constant?

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Can variables be used in sql statements?

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How to run sql commands in sql*plus?

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What are the datatypes a available in PL/SQL ?

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Explain commit, rollback and savepoint.

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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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Where is sql database stored?

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What is the difference between sum and count in sql?

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What is the difference between microsoft access and sql server?

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what is a database transaction? : Sql dba

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