For rn (row number) = 1, x and y always stays as 0. Now I need to update the rest of x and y columns based on the above scenario(IF ..ELSE). I am unable to update the next row without updating the previous row. Is there a way to do this in a query Answer You can use a recursive
Tag: postgresql-9.6
Lookups in for single PostgreSQL table suddenly extremely slow after large update
I have a messages table with a few million records in it. My Rails app includes a query on most pages to count the number of unread messages to show the user. This query – and all queries of the messages table – is unchanged and was working fine until yesterday. Yesterday, I created a new messages column and ran
Aggregate rows according to JSON array content
I have a PSQL table with json tags, that are always strings stored in a json array : I would like to query, for instance, the count of entries in the table containing each tag. For instance, I’d like to get : I tried but if does not work, since it gives I guess I need to get the list
Get all Many:Many relationships from reference/join-table
I am having difficulty querying for possible relationships in a Many:Many scenario. I present my schema: What I do know how to query with this schema is: All Bands that a given User belongs to. All …
Any way to get a more meaningful error message in postgres?
Let’s have some tea … CREATE OR REPLACE FUNCTION allRelevantTeas() RETURNS TABLE(tea_id INTEGER) AS $function$ DECLARE result REFCURSOR; stmt TEXT; countries_with_tea TEXT[] := array[‘…
jsonb LIKE query on nested objects in an array
My JSON data looks like this: given a text “foo” I want to return all the tuples that have this substring. But I cannot figure out how to write the query for the same. I followed this related answer but cannot figure out how to do LIKE. This is what I have working right now: Instead of passing the whole