sql - How to dynamically calculate the sums of many columns in a GROUP? -


in table below, have variable number of columns, , number in 1000s. need sum values of each of 1000 columns grouped person's name. so, smith's total test_score_1, total test_score_2,...total test_score_1000. , jackson's total test_score_1, total test_score_2,...total test_score_1000.

i don't know number of 'test_score_n' columns beforehand , changing.

so given table:

name      test_score_1 test_score_2 ...  test_score_1000   smith        2              1                 0   jackson      0              3                 1   jackson      1              1                 2   jackson      3              0                 3   smith        4              5                 1

how can produce table below?

name      test_score_1 test_score_2 ...  test_score_1000   smith        6              6                1   jackson      4              4                6

sql generate sql

declare @generatedsql nvarchar(max);  set @generatedsql = (  select     'select ' +      substring(x.foo, 2, 2000) +      'from ' +      quotename(schema_name(t.schema_id)) + '.' + quotename(t.name) +     ' group name' --fix line , edited     sys.tables t     cross apply      (     select         ', sum(' + quotename(c.name) + ')'              sys.columns c               c.object_id = t.object_id         ,         c.name <> 'name'     xml path('')     ) x (foo)     t.name = 'mytable'  );  exec (@generatedsql);

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