The "duplicates" tag concerns detecting and/or dealing with multiple instances of items in collections.
It's easy to find duplicates with one field: SELECT name, COUNT(email) FROM users GROUP BY email HAVING COUNT(email) &…
sql duplicatesI have a very simple JavaScript array that may or may not contain duplicates. var names = ["Mike","Matt","Nancy","Adam","…
javascript arrays duplicates uniquePretty much I need to write a program that checks if a list has any duplicates and if it does …
python algorithm list duplicates intersectionWhat is the best way to remove duplicate rows from a fairly large SQL Server table (i.e. 300,000+ rows)? The …
sql-server tsql duplicatesI need to retrieve all rows from a table where 2 columns combined are all different. So I want all the …
sql postgresql sql-update duplicates distinctHow can I delete duplicate rows where no unique row id exists? My table is col1 col2 col3 col4 col5 …
sql sql-server-2008 duplicates sql-deleteI have an ArrayList<String>, and I want to remove repeated strings from it. How can I do …
java list collections arraylist duplicatesI want to pull out duplicate records in a MySQL Database. This can be done with: SELECT address, count(id) …
mysql duplicatesHow can I find the duplicates in a Python list and create another list of the duplicates? The list only …
python list duplicatesIs it possible to remove duplicated rows in Notepad++, leaving only a single occurrence of a line?
duplicates notepad++