When I perform SELECT * FROM table I got results like below: 1 item1 data1 2 item1 data2 3 item2 data3 4 item3 data4 As you can see, there are dup records from column2 (item1 are dupped). So …

Oct 15, 2012 · I want to get the unique values from the following list:

Apr 3, 2017 · uniqueId = df["Id"].unique() I get a list of unique IDs. How can I apply this filtering on the whole DataFrame such that it keeps the structure but that the duplicates (based on "Id") are removed?

The OP is asking about whether it is possible to add an Attribute to an Entity class for a Unique Key. The short answer is that it IS possible, but not an out-of-the-box feature from the EF Core Team. If you'd …

I have an array of numbers that I need to make sure are unique. I found the code snippet below on the Internet, and it works great until the array has a zero in it. I found this other script here on

Mar 5, 2012 · Unique Key (UK): It's a column or a group of columns that can identify a uniqueness in a row. Primary Key (PK): It's also a column or group of columns that can identify a uniqueness in a …

In the table, one customer like John Smith can have multiple addresses. I need the SELECT query for this table to return only first row found where there are duplicates in 'CName'. For this table it should …

Apr 5, 2019 · SELECT DISTINCT my_col, count(*) OVER (PARTITION BY my_col ORDER BY my_col) AS num_rows FROM my_tbl Using this OVER based approach is of course optional. In the above …

Dec 8, 2012 · How can I find the unique lines and remove all duplicates from a file? My input file is 1 1 2 3 5 5 7 7 I would like the result to be: 2 3 sort file | uniq will not do the job. Will show all val...

Dec 16, 2015 · In my table I have several duplicates. Ineed to find unique values in mysql table column. SQL SELECT column FROM table WHERE column is unique SELECT column FROM table WHERE …