I am learning Docker. I have practiced a lot, including testing commands from the official Postgres page on dockerhub. I ran this command: docker run -it --rm --network some-network postgres psql -h some-postgres -U postgres Could someone give a complete…
I want to 'group by' beers so that they are grouped together, with the respect aggregate rating and tasters (people who review the beers) listed in separate columns. Here is my code: create or replace view tasters_avg_ratings1 as select a.taster…
Situation: I have Model have a relation 1-1, sample: class User(models.Model): user_namme = models.CharField(max_length=40) type = models.CharField(max_length=255) created_at = models.DatetimeField() ... class Book(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) And I have a around 200,000 records. Languague: Python Framework: Django Database: Postgres…
{ "List1": [ { "f1": "b6ff", "f2": "day", "f3": "HO", "List2": [{"f1": 1.5,"f2": "RATE"}] }] } This is nested JSON in which there's a list 'List2' inside another list 'List1'. how to filter f1 = 1.5 in List2? I have…
When I using query to select values to temp table like this: drop table if exists tTemp; select tt.id, tt.name into tTemp from test.TestTable tt It's work great. But when I using this construction in function I have this error:…
I have a table named orders in a SQL database that looks like this: user_id email segment destination revenue 1 [email protected] basic New York 500 1 [email protected] luxury London 750 1 [email protected] luxury London 500 1 [email protected] basic New York…
I have a table of users and a table of values which have a foreign key to the users table. I want to insert values into the values table which either reference an existing user or create one. I'm using…
So, in my project, a user needs to register first before logging-in. I am trying to display their first, middle and last name. But, I am having a problem since multiple data are displayed on my input field. What is…
I'm using Node Red and Postgresql to record events, one event is that a specific 0x40 light has been switched on, another event is that the same light has been switched off. For simplicity, the on and off times have…
So I've actually got two issues with PostgreSQL. I actually use npgsql.NET to create queries, connections, other with PostgreSQL, however I am new to this database software. First Issue I got the error: Npgsql.PostgresException: '42601: syntax error at or near…