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CIT196 Ch 5 and 6

Terms for CIT196 DB Mgmt Chapters 5 and 6

TermDefinition
subquery A SELECT statement that's coded within another SQL statement
Aggregate function Also called a column function; performs calculation on values in a selected rows.
Summary query SELECT statement that includes one or more aggregate functions
Scalar function Operates on a single value, and returns a single value
Functionally Dependent column Grouping column must be a primary ey of the table that contains the column in the SELECT clause or it must be unique and not allow null values
Aggregate Window Function Groups and partitions are not colapsed to a single row like they are when using aggregate functions using GROUP BY
Window Consists of all of the rows that are needed to calculate the aggregate value for the current row
Frame The number of rows before and after the current row (ROWS) or a range of values based on the value of the current row (RANGE)
Moving Average Calculated by adding the value of the current row to the values of zero or more preceding and following rows.
Named Window Define using a WINDOW clause and should be coded after the HAVING clause and before the ORDER BY clause, if those clauses are included.
Peer Row that has the same value as other rows in the sort column.
Partition Concept used by aggregate window function for 'group'. PARTITION BY clause
Created by: Leisac
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