This was a question asked in a interview.Can someone help me
A study database contains a treatment table table (TREAT) with Subject ID
(SUBJID) and treatment start date (TRTSDT) and a subject status table (STAT)
with Subject ID (SUBJID), Subject Status (STATUS) and Status Update Date
(STATUSDT). The treatment table has one row per patient. The subject status
table has at least one row per patient. Merge the two tables and select the
most recent record to provide the last know subject status and the number of
days to the last status update. Formats from the database are provided below.
TREAT | STAT
|
SUBJID TRTSDT | SUBJID STATUS STATUSDT
<8.0> <datetime22.> | <8.0> <$15.> <date9.>
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