Answer Posted / romeu viegas

Select ...
FROM ...
WHERE ...
FETCH FIRST 1 ROW ONLY

what is the responsibility of the construction superintendent

2209

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What is the use of predicate?

1085

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Define data page.

1128

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When a COBOL-DB2 program in PRODUCTION is updating main tables and gone for long run, what have to do?

3632

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What is check constraint in db2?

1163

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What is the difference between "db2ilist" and "db2 get instance" commands in DB2 Database Server?

1312

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When the like statement is used?

1280

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What does db2 stand for?

1089

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What does reorg do in db2?

1074

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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.

2722

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What are the different types of base tables?

1161

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How to find schema of a table in db2?

1066

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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?

2436

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How do I add a column to an existing table in db2?

1080

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What's The Error Code For Unique Index Voilation?

1299

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