This is probably a newbie question (bear with me) but how can I calculate the average for a list of numbers using SQL and the AVG function? I mean, I can add together numbers in SQL like: SELECT ...
I have the following scenario. A users table, a records table and a memberships table. A user can be associated to zero or more records either directly with the records table records.user_id = ...
I can't find a way to make Group by works in Postgresql, How can i make group by works so each name will be only one , not repeated many times like what i got in this picture? Here is a code for what ...
I have a query that does this sort of thing: (SELECT rel_id, timestmap, y FROM table_1 AS full_ WHERE full_.timestamp BETWEEN %s AND %s ORDER BY full_.timestamp) UNION ALL (SELECT rel_id, ...
I have a table with three columns, Id Serial. Value real. timein Timestamp. I want to select the values based on a range of days ie. from two days ago until now. The table may contain one or two ...