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Consider you have a composite index of three columns. Now, you have to provide the value of two columns in the where clause of a select query. Do you think index can be used for the operation?
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I have a table like this tblData (month int,Qty int) and i am inserting three rows in this table 1.tblData Values (1,100) 2.tblData Values (2,200) 3.tblData Values (3,300) The Result I want is the Running total of the field Qty that is 1 100 100 2 200 300 3 300 600 What is the Query for that ?
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