Here is another good article on removing duplicates. It discusses why its hard: "SQL is based on relational algebra, and duplicates cannot occur in relational algebra, because duplicates are …

Jul 3, 2017 · Remove all duplicates, but the very first ones (with min ID) should work equally in other SQL servers, like Postgres: DELETE FROM table WHERE id NOT IN ( select min(id) …

Sep 12, 2010 · It does not answer your question and remove the duplicates but it helps give a count which might be relevant: COUNT(*) - COUNT(DISTINCT name) AS 'duplicate name' – …

You can use the DISTINCT in SQL Server to get the distinct records only. Apart from this you can also use the ROW_NUMBER (Transact-SQL) function to get the distinct result by assigning …

Sep 18, 2008 · Then copy the keys, but eliminate the duplicates. SELECT DISTINCT t1.* INTO holddups FROM t1, holdkey WHERE t1.col1 = holdkey.col1 AND t1.col2 = holdkey.col2 In …

However, what I want is to get duplicates with the same email and name. That is, I want to get "Tom", "Tom". The reason I need this: I made a mistake, and allowed inserting duplicate name …

Jan 19, 2017 · If you just want to return the most recent row for name, you can use: select t.* from t where t.date = (select max(t2.date) from t t2 where t2.name = t.name);

Jul 14, 2009 · The two most common ways I've seen are adding Distinct to Top 1 or you could add a column to the query that is unique so that sql would have a way to choose which record …

May 29, 2018 · Or without duplicates with the usage of that function: select Person, fn_DistinctSeparatedList(STRING_AGG(Pet, ', '),', ') from #PetsOwner group by Person Share

Mar 13, 2019 · You should do a small pl/sql block using a cursor for loop and delete the rows you don't want to keep. For instance: declare prev_var my_table.var1%TYPE; begin for t in (select …