sql return a query result to a variable

It´s possible return a query result to a variable instead a datareader. For ex. in some cases i need return only a sum or two.
rflorencioAsked:
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
for a single value: yes:
ExecuteScalar() returns an object with the single value.

as soon as you need more values/rows, either use a stored procedure with adequate output parameters, or do use the datareader (or dataset/datatable)
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