How many row comparison operators are used while working with a subquery?

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Is sql harder than python?

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What are basic techniques of indexing?

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What is java sql package?

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Is clustered index a primary key?

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Can we use insert statement in 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.

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How do I turn a list into a table?

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What is cursor status?

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Why do we need cursors in pl sql?

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How do you create a db file?

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what are local and global variables and their differences? : Sql dba

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