What does the argument [or replace] do?

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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 program will open a mdb file?

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write a procedure to print a statement or number not using "dbms_output.put_line" package.write a procedure instead of it using procdure name as "print" ex:- declare a number:=2; begin print(a); end; /* when U type above procedure 2 have to should be printed*/

2 Answers   iFlex,

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select 10 from dual; y its showing all the rows with 10?

1 Answers  

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Explain the difference between sql and mysql.

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How many types of relationship are there?

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in sql table following column r there i want find 1st paid ,2nd paid,3rd paid date for same |service_type|date |vehicle_no| |------------|------|_---------| |paid |23 jan|MH12H2007 | | | | | |paid |26 feb|MH12H2007 | | | | | | | | | |paid |28 mar|MH12H2007 | i want o/p like below vehicle no| 1st paid date | 2nd paid date|3rd paid |latest paid date| pls help me out

4 Answers  

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Is it possible to update views?

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What is Raise_application_error ?

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Talk about views

10 Answers   Polaris,

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how to saw triggers output in pl/sql database?

1 Answers  

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