Calculate average and total values from a sampled hosp10_2023_nmrc, joined with hosp10_2023_alpha using composite keys (category/code_1, subcategory/code_2, item/code_3) and grouped by description. This uses TABLESAMPLE to prevent timeouts.

Calculate average and total values from a sampled hosp10_2023_nmrc, joined with hosp10_2023_alpha using composite keys (category/code_1, subcategory/code_2, item/code_3) and grouped by description. This uses TABLESAMPLE to prevent timeouts.