is there a way to get the maximum count of contiguous years? for example:
SELECT version();
PostgreSQL 8.3.1, compiled by Visual C++ 1400
CREATE TABLE sch_applform
(
scholar_id integer NOT NULL,
award_year numeric(4) NOT NULL,
CONSTRAINT sch_applform_pkey PRIMARY KEY (scholar_id, award_year)
)
WITH (OIDS=FALSE);
INSERT INTO sch_applform VALUES (1, 1994);
INSERT INTO sch_applform VALUES (1, 1995);
INSERT INTO sch_applform VALUES (1, 1996);
INSERT INTO sch_applform VALUES (1, 1997);
INSERT INTO sch_applform VALUES (1, 1999);
INSERT INTO sch_applform VALUES (1, 2000);
INSERT INTO sch_applform VALUES (1, 2001);
INSERT INTO sch_applform VALUES (2, 1994);
INSERT INTO sch_applform VALUES (2, 1996);
INSERT INTO sch_applform VALUES (2, 1997);
INSERT INTO sch_applform VALUES (2, 1998);
INSERT INTO sch_applform VALUES (2, 1999);
INSERT INTO sch_applform VALUES (2, 2000);
INSERT INTO sch_applform VALUES (2, 2002);
INSERT INTO sch_applform VALUES (3, 1994);
INSERT INTO sch_applform VALUES (3, 1995);
INSERT INTO sch_applform VALUES (3, 1997);
INSERT INTO sch_applform VALUES (3, 1998);
INSERT INTO sch_applform VALUES (3, 2000);
INSERT INTO sch_applform VALUES (3, 2001);
is there a select statement containing 'AND award_year BETWEEN 1994
AND 2002' that could generate the following?
scholar_idconsistent_yrs
1 4
2 5
3 2
thanks in advance
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