SQL Editing Year - sql

Question

The query works but only give years 1985 values. How do I add unlimited amount of years (1985-2014)
use baseball;
SELECT CAST(tf.franchname AS CHAR(20)), s.yearID, s.lgid, AVG(s.salary)
FROM salaries s, teams t, teamsfranchises tf
WHERE s.teamID = t.teamID AND
t.franchID = tf.franchID AND
s.yearID = 1985 AND
(s.lgid='AL' OR s.lgid='NL') GROUP BY tf.franchname, s.yearID, s.lgid order BY
s.yearID;

Answer 1

You could just use BETWEEN.
Your where clause should then look like
(s.yearID BETWEEN 1985 AND 2014) and
Alternatively you could use the < and > operators:
(s.yearID >= 1984 and <= 2014)
If, for any reason you don't have a continous range of years (You only want 5 years). IN could also be an option:
s.yearID IN (1984, 1991, 1996, 2001, 2006)

Answer 2

Your query has a condition filtering on the year and s.yearID = 1985, you may want to change it using the keyword BETWEEN or removing it altogether depending of your need.

Answer 3

select cast(tf.franchname as char(20)), s.yearID, s.lgid, avg(s.salary)
from salaries s, teams t, teamsfranchises tf
where s.teamID = t.teamID and
t.franchID = tf.franchID and
(s.yearID between 1985 and 2014 )and
(s.lgid='AL' OR s.lgid='NL')
group by tf.franchname, s.yearID, s.lgid
order by s.yearID;

Answer 4

This is another view, when there is no data and still you want to get the year with zero count. Just check this link
In this you can create a temporary table which return the list of your years ie 1985 to 2015 , then just join with left outer join and see the magic.
I just get yourquery, you can replace with the accepted answer query too.
Declare #Startyear int = 1985
--1st approach to get continues year
;with yearlist as
(
select 1985 as year
union all
select yl.year + 1 as year
from yearlist yl
where yl.year + 1 <= YEAR(GetDate())
)
select year from yearlist order by year desc;
--2nd approach to get continues year
;WITH n(n) AS
(
SELECT 0
UNION ALL
SELECT n+1 FROM n WHERE n < (year(getdate()) -#Startyear)
)
SELECT year(DATEADD( YY, -n, GetDate()))
FROM n ORDER BY n
--take anyone approach and then join with your query
;with yearlist as
(
select 1985 as year
union all
select yl.year + 1 as year
from yearlist yl
where yl.year + 1 <= YEAR(GetDate())
)
select year from yearlist
left join
(
SELECT CAST(tf.franchname AS CHAR(20)), s.yearID, s.lgid, AVG(s.salary)
FROM salaries s, teams t, teamsfranchises tf
WHERE s.teamID = t.teamID AND
t.franchID = tf.franchID AND
s.yearID = 1985 AND
(s.lgid='AL' OR s.lgid='NL') GROUP BY tf.franchname, s.yearID, s.lgid order BY
s.yearID
) yourtable on yourtable.yearID = yearlist.year
order by year desc;