I have DB with 4 tables. I have to use 3 of them. Is it possible to change LEFT JOIN statements with only WHERE statement? Database scheme My code block with LEFT JOIN statements: FROM reader LEFT JOIN copy ON…
public class Post { private int id; private String title; private String content; private Date createdAt; } content field is the text field. This field value actually is a Json object, I converted it to text. How can search efficient…
I want to copy data from one table in schema "test" to another table in schema "public". Both tables are identical, but the field "type" is a custom type named "item_type". The types are defined within their schema. Both types…
I am following the symfony book on symfony.com to learn symfony. When I create my symfony project I update my docker-compose.yml like this (values for the db name, password and user are just example): version: '3' services: ###> doctrine/doctrine-bundle ###…
I have a table with a JSONB field and would like to insert into it using a named dict like so: sql = "INSERT INTO tbl (id, json_fld) VALUES (%(id)s, %(json_fld)s)" conn.execute(sql, {'id':1, 'json_fld': {'a':1,'b':false, 'c': 'yes'}}); I tried the…
I had a requirement like, I need to form a query based on JSONB object parameter and returns its output. JSONB parameter contains Table name, where clause details, Column value to be returned form a table. Below is the sample…
I'm using class-validator in my NestJS application and have a challenge with certain fields. For instance, I have a field sample_result which can contain a number, but I'd like to be able to update or set this field to null…
I have to create a query to show group_id and the list with subjects and number of people from this group per subject. I have table 'group' with 'entity_type', that can define person's subject and with 'group_type' that defines in…
I'm starting from a scenario where a PostgreSQL instance is not configured for logical replication and has a table T with X rows. Now, when I'll enable the logical replication, create a replication_slot and a publication for the table T…
I have 3 tables: conversations participants contacts participants is many to many between conversations and contacts. It has contact_id, and conversation_id. I want to write a select query that takes one or more contact_id values and returns a record from…