Top "Unique" questions

Generating random, unique values C#

I've searched for a while and been struggling to find this, I'm trying to generate several random, unique numbers is …

c# .net random unique

jQuery - remove duplicates from an array of strings

Possible Duplicate: Easiest way to find duplicate values in a JavaScript array jQuery.unique on an array of strings I'm …

javascript jquery arrays string unique

Find the unique values in a column and then sort them

I have a pandas dataframe. I want to print the unique values of one of its columns in ascending order. …

python pandas sorting dataframe unique

Checking if all elements in a list are unique

What is the best way (best as in the conventional way) of checking whether all elements in a list are …

python algorithm list unique

How can I get unique values from an array in Bash?

I've got almost the same question as here. I have an array which contains aa ab aa ac aa ad, …

linux arrays bash unique

row_number() Group by?

I have a data set that contains the columns Date, Cat, and QTY. What I want to do is add …

sql-server tsql unique row-number

#1062 - Duplicate entry '' for key 'unique_id' When Trying to add UNIQUE KEY (MySQL)

I've got an error on MySQL while trying to add a UNIQUE KEY. Here's what I'm trying to do. I've …

mysql unique unique-key

How to add count of unique values by group to R data.frame

I wish to count the number of unique values by grouping of a second variable, and then add the count …

r count unique aggregate

How to make "No Duplicates" column in SQL Server 2008?

I have a simple table in my SQL Server database. This table contains two columns: ID int, Name nvarchar(50). The …

sql-server unique unique-constraint

Rails: how can I get unique values from column

How can I get unique values from column in the table? For example, I have this Products table: ID NAME …

ruby-on-rails ruby-on-rails-3 unique