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Give some example of statistics collected during RUNSTATS?
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Answer / sadiq afroze
Number of rows in the table, Percent of rows in clustering
sequence, Number of distinct values of indexed column,
Number of rows moved to a nearby/fairway page due to row
length increase
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when i am trying to update a table having 1000 rows. the program abends.how we will come to know the last successful updated row was. we are not using any commit operations
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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.
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