Hi RBS,
Looking at the fastest way to convert a field in a table and wonder
if in
general an update with a CASE WHEN construction or an update with a
join to
a lookup table is faster.
Perhaps the alternative form of the CASE statement would be faster,
but I don't know:
case ENTRY_TYPE
when 9 then 'Issue
when 2 then 'Note'
when 1 then 'Encounter'
when 8 then 'Authorisation'
when 11 then 'Prescription'
when 5 then 'Treatment'
when 3 then 'Problem'
when 13 then 'Discontinuation'
when 6 then 'Reminder'
when 14 then 'Adverse reaction'
when -1 then 'Unknown'
when 4 then 'Sub-problem'
when 7 then 'Battery'
when 10 then 'Return-Script'
else ENTRY_TYPE
end
Tom
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