troubleshooting Question

Calculating Length of Stay with lots of NULL values involved

Avatar of Becky Edwards
Becky EdwardsFlag for United States of America asked on
SQL
4 Comments1 Solution123 ViewsLast Modified:
I need to bring back a calculation for Length of stay for a patient IF they have a discharge date and an admit date.
Otherwise I need it to show a blank or a 0.  Is that possible?

Lots of pre-requisites in this case statement:
If no discharge date then 0 or blank
If no IP admit date use Regular Admit Date
If no admit dates at all, then 0 or blank
If no admit dates OR discharges date, bring back 0 or blank

If Admit Date minus discharge date is less than 24 hours then 1
If more than 24 hours then subtract "applicable" admit date from discharge date and provide that number.

The latest error message for my current query is:

Msg 257, Level 16, State 3, Line 38
Implicit conversion from data type datetime to int is not allowed. Use the CONVERT function to run this query.

Attached are two snippets,
One that doesn't work and brings back the error message above.
one that works but brings back NULL values.LengthOfStay_Querylanguage.docx
ASKER CERTIFIED SOLUTION
pcelba

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