9 Obviously, COUNT(DISTINCT) with multiple columns counts unique combinations of the specified columns' values. However, one other important point is that a tuple is counted only if none of the …

Aug 24, 2016 · For instance, if you tried to apply this method to this two-column set: (1, 3), (1, 2), (2, 3) to select two distinct rows, you might only get one if the first selected row happened to be (1, 3).

May 28, 2015 · Supposing we have a table with four columns (a,b,c,d) of the same data type. Is it possible to select all distinct values within the data in the columns and return them as a single …

Mar 9, 2018 · I am unclear on exactly on, SELECT DISTINCT col1, col2, ... FROM table_name When called on one column it gives back only distinct values of that column. What happens when we use it …

I need to query an SQL database to find all distinct values of one column and I need an arbitrary value from another column. For example, consider the following table with two columns, key and val...

Apr 14, 2020 · I'm trying to count multiple columns in a select statement for a class I'm in. Everything is coming from the same table. I want to know how many times that person paid something and how …

I have a query which uses three lookup tables to get all the information I need. I need to have DISTINCT values for one column, however I also need the rest of the data associated with it. My SQL...

Feb 1, 2017 · Select distinct multiple columns with one result column Ask Question Asked 9 years ago Modified 9 years ago

Jul 9, 2019 · Is there a way to get count based on multiple columns but still have it be distinct in SQL? Ask Question Asked 6 years, 7 months ago Modified 6 years, 7 months ago

Feb 5, 2021 · Sum multiple columns, based on distinct values in different Columns Ask Question Asked 5 years ago Modified 3 years, 4 months ago