Question : First, I aplogized because I have some problem to formalized my question so any idea on express it […]
Tag: distinct
Count all rows for each DISTINCT
Question : How can count all rows of WHERE statement: SELECT DISTINCT column1 FROM table COUNT WHERE date::text LIKE ‘%2014%’; […]
How to join two columns and find unique combinations
Question : I have the following topological structure (topo) with their types: id(string) | id_from(string) | id_to(string) | type(string) ‘111’ […]
Select distinct column values from multiple databases
Question : I have 100 databases from customers who all have the same schema but different content. Now I wanted […]
Remove duplicate comparisons in postgres?
Question : I have a polygon layer named scale_polygons_v4. I want to get ids of overlapping polygons. I have tried […]
Select the rows only when all sub columns contain the same value [duplicate]
Question : This question already has answers here: Select same records that only have different values for a particular column […]
performances of distinct/group by
Question : I’m trying to select the most recent authors of messages in a room, using this (simplified) table: Table […]
Rank vs. Distinct
Question : Just for curiosity, if I have to use rank to tag distinct values for some columns only, and […]
Select Distinct with Inner Join Bringing duplicated Values
Question : I am having trouble using inner join to bring unique values from two tables. SELECT distinct cast (opd.order_number […]
Select Distinct with Inner Join Bringing duplicated Values
Question : I am having trouble using inner join to bring unique values from two tables. SELECT distinct cast (opd.order_number […]