How does join work in sql?

0 Answers  

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explain advantages of myisam over innodb? : Sql dba

0 Answers  

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how to findout the 100th maximum salary

28 Answers   Amdocs,

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how do u call in & out parameters for stored procedures?

10 Answers   A1 Technology, TCS, Techicon,

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What is cte?

0 Answers  

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What programs use sql?

0 Answers  

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what are the drivers in mysql? : Sql dba

0 Answers  

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What is the difference between anonymous block and named block or stored procedure?

8 Answers  

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What is not equal in sql?

0 Answers  

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display null value rows with out using null function?

8 Answers   Infosys,

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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 having clause in sql?

0 Answers  

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