I am trying to update the records of one table using others but getting failed with the error. Can someone pls help how to fix the below query for updating records : ERROR: multiple updates to a row by the…
I have the following query to display the performance of a machine in 8-hour segments (although it can change to 1 hour, 1 week, 1 month, etc.). My table has 2 million records, and the query takes 10 seconds to…
The following query is attempting to exclude one array from the main array, then group results. SELECT utc_offset, is_dst, ltrim( trim(string_agg(distinct (CASE WHEN abbrev NOT LIKE '+%' AND abbrev NOT LIKE '-%' AND abbrev != name THEN abbrev ELSE ''…
I have a customer table having following colums - customerId-primary key, customer_name, food_preference, country, wallet_balance. The requirement is to get all customer data with - food_preference is vegetarian country is"USA" wallet_balance greater than 5000 So in the CustomerRepo in my…
When paginating without cursors, it's possible to see phantom reads. E.g. paginating over a large set of data like so: // assume isolation level = READ COMMITTED SELECT * FROM users ORDER_BY age ASC LIMIT :pageSize OFFSET :page * :pageSize…
SELECT * FROM table WHERE NOT (table IS NOT NULL); finds all the rows in table that have a null value in any column. The logic is clear (see answer), but want to understand this syntax. A statement in an…
These two queries are giving different results in postgresql not (field_name like any(array['a','b']) is giving values that are not a or b as expected whereas field_name not like any(array['a','b']) is checking for both a and b values I basically want…
I have a table definition like the following: CREATE TABLE what_happened ( id SERIAL PRIMARY KEY, action VARCHAR(128), created TIMESTAMP WITH TIME ZONE NOT NULL ); I want to be able to store the original time offset given for the…
In Postgres, given a collection of date ranges like: meter_id device_id start_at end_at meter1 device1 2020-01-02 10:30 2025-01-02 14:00 meter2 device1 2020-01-02 10:30 2020-01-02 11:30 meter3 device1 2020-01-02 10:30 2020-01-03 11:30 I want to bucket the ranges into: a range…
I have a hierarchal aggregate that uses below statement CREATE MATERIALIZED VIEW IF NOT EXISTS public.values_summary_five_minutes WITH (timescaledb.continuous,timescaledb.materialized_only = true) AS SELECT variableid, time_bucket(INTERVAL ‘5 minute’, bucket_interval_one_min) AS bucket_interval_five_min, MIN(Min_IntValue) as Min_IntValue, MAX(Max_IntValue) as Max_IntValue, SUM(Sum_IntValue) as Sum_IntValue, COUNT(Count_IntValue) as…