check whether all the emp numbers are indeed unique.

6 Answers  

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package specification-3 procedures package body-2 procedures will is execute

2 Answers   PWC,

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How to find only %th Highest Sal

6 Answers   Infogain, Symphony,

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What is case function?

0 Answers  

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What is java sql driver?

0 Answers  

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what are the advantages of mysql in comparison to oracle? : Sql dba

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What is trigger price?

0 Answers  

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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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What is a dynamic query?

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How many sectors are in a partition?

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What are the types of operators available in sql?

0 Answers  

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What is procedure function?

0 Answers  

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