SQL in a Nutshell, 3rd Edition

ANSI SQL2003’s Window Syntax

SQL2003 specifies the following syntax for window functions:

FUNCTION_NAME(expr) OVER {window_name | (window_specification)}
window_specification ::= [window_name] [partitioning] [ordering] [framing]
partitioning ::= PARTITION BY value[, value...] [COLLATE collation_name]
ordering ::= ORDER [SIBLINGS] BY rule[, rule...]
rule ::= {value | position | alias} [ASC | DESC] [NULLS {FIRST | LAST}]
framing ::= {ROWS | RANGE} {start | between} [exclusion]
start ::= {UNBOUNDED PRECEDING | unsigned-integer PRECEDING | CURRENT ROW}
between ::= BETWEEN bound AND bound
bound ::= {start | UNBOUNDED FOLLOWING | unsigned-integer FOLLOWING}
exclusion ::= {EXCLUDE CURRENT ROW | EXCLUDE GROUP |               EXCLUDE TIES |
 EXCLUDE NO OTHERS}