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  2. MIDRANGE-L
  3. October 2009

SQL and a Running/Moving Total

Table has 3 columns,Name,year,count and I need a total of the "count" field
for each name over a 3 yr period, if there are NOT 3 years available then no
output row.

Example:
Bill 1990 72
Bill 1991 73
Bill 1992 71
Bill 1993 55
Bill 1994 78
Bill 1995 73
Stan 1990 130
Stan 1991 122
Stan 1992 100
Stan 1993 115
Stan 1994 101
Stan 1995 112

What I want from the SQL output is

Bill 1990 216
Bill 1991 199
Bill 1992 204
Bill 1993 206
Stan 1990 352
Stan 1991 337
Stan 1992 316
Stan 1993 328

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