I have a table where patient visits are logged each visit, the table is:
patientnumber,visitdate,location
I need to select and count the number of records that have 2 or more entries
with the same patientnumber
in sql-english:
select count(*) where there are two or more records with the same
patientnumber
Any help with the SQL to do this would be much appreciated. Thanks!
Jon
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