The "duplicates" tag concerns detecting and/or dealing with multiple instances of items in collections.
I have a table in a PostgreSQL 8.3.8 database, which has no keys/constraints on it, and has multiple rows with …
sql postgresql duplicatesIf I have a text file with the following conent red apple green apple green apple orange orange orange Is …
linux text duplicatesI'd like to concatenate two dataframes A, B to a new one without duplicate rows (if rows in B already …
python pandas duplicatesHow to allow php array to have duplicate keys? When I try to insert a key, value pair with already …
php arrays duplicatesI have a collection in MongoDB where there are around (~3 million records). My sample record would look like, { "_id" = ObjectId("50731…
mongodb optimization duplicates keySay I have a list of links with duplicate values as below: <a href="#">Book</a> &…
jquery duplicatesEdit 2019: This question was asked prior to changes in data.table in November 2016, see the accepted answer below for both …
r duplicates data.tableI use the line of code below to loop through a table in my database: $items_thread = $connection -> …
php arrays duplicates array-uniqueHow to delete duplicate items in excelsheet(column), where it has to delete the items which has more than one …
excel duplicates excel-2007I have a text file that contains a long list of entries (one on each line). Some of these are …
vim duplicates