Chapter12: Subqueries And Merge Statements
Section: Chapter Questions
Problem 19MC
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Using SQL answer the following or how would I answer something similar.
Create a temporary table T for diagnoses_icd, such that only the first three characters of the diagnosis code are preserved. Subsequently, count the number of unique diagnoses in T count the number of unique diagnoses for each animal patient in T
Repeat 1 entirely, except the first three digits in every diagnosis should be preserved (in addition to any letters) and saved in a temporary table T1. E.g., for code ‘S4001’ preserve ‘S400’; for ‘0456’ preserve ‘045’. Use T1 created in
2. Count animal patients diagnosed for each ICD code* and list the top 10 most common diagnoses. *Do not count a animal patient more than once for each ICD
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