Answer / saikishore

select TIMESTAMP(DATECOLUMN)
FROM TABLE1

explain about index with examples

2 Answers   Syntel,

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What is a DBRM, PLAN ?

3 Answers  

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If a table has a column "dept" (declared to have nulls) and there are 10 rows in the table of which 3 have a null value in the dept column, what will select count(*) and select count(distinct dept) return?

6 Answers  

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I have a subprogram B calling from mainprogram A.I have opened a cursor in A ,Can i fetch the same cursor in subprogram B , If yes , Please explain the reason?

0 Answers   HeadStrong,

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What error I will get if my select query gives multiple row while executing a Cobol-DB2 program.How can I solve it without using a cursor.

4 Answers   Cap Gemini, Verizon,

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What do you need to do before you do EXPLAIN?

1 Answers  

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What is explain in db2?

0 Answers  

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How to create a table using embedded sql?

1 Answers  

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SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.

0 Answers  

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a cursor normally gets closed once we provide a commit . If u try to close the same cursor with close cursor command later after providing the commit will there be any sql-error.

3 Answers  

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What is the specific need of Plan and..where are the tables in DB2 are physically saved

3 Answers   Infosys,

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What is the use of db2 optimizer?

0 Answers  

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