What is package in pl sql?

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How do I view output in sql developer?

0 Answers  

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what are dynamic queries in t-sql? : Transact sql

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What is compound trigger?

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What is difference between inner join and self join?

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What is secondary key?

0 Answers  

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How to improve the performance of a pl/sq stored procedures or functions or triggers and packages ?

12 Answers   IBM, TCS, UHD,

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Explain how procedures and functions are called in a PL/SQL block ?

3 Answers  

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what are all types of user defined functions? : Sql dba

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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 the difference between char and varchar data types? : Sql dba

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Differences between UNIQUE and DISTINCT in select statements

26 Answers   ABS, DELL, Deloitte, Hewitt, Oracle, Verinon Technology Solutions, Wipro,

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