What is the difference between a primary key and a clustered index?

0 Answers  

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how to write date and time literals? : Sql dba

0 Answers  

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a procedure one in two out parameters i am waiting it in a sql query can i get the output

1 Answers  

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declare lowerl number:= 1; upperl number:= 3; num varchar2(10); begin for i into lowerl..upperl loop num:=num||to_char(lowerl); if i=3 then upperl:=5; end loop; message(num); What will be the output ?

3 Answers   Oracle,

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Is sql sequential or random?

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what is collation? : Sql dba

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how u can find the n row from a table?

19 Answers   Tech Mahindra,

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what is Hash join?how it is different from inner join?what is the sign used for inner join?(eg: like the (+) sign used for outer join)?

3 Answers   TCS,

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what is the use of anchoring object? what r the difference between anchoring object & enclosing object? can any one tell me all the details?

0 Answers  

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What are the limitations of sql express?

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What is normalization in a database?

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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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