I want to use jsonb to solve the problem in Postgres. There are many problems here, what I want to do is:
SELECT table.column->>’key_1′ as a FROM “table” I tried -> there are some combination
Category: Postgresql
PostgresQL is an object-relational database management system (ORDBMS) based on version 4.2 of POSTGRES developed by the Department of Computer Science at the University of California, Berkeley. It has now been renamed to PostgreSQL. PostgreSQL supports most SQL standards and provides many other modern features: complex queries, foreign keys, triggers, views, transaction integrity, MVCC. Similarly, PostgreSQL can be extended in many ways, for example, by adding new data types, functions, operators, aggregate functions, and indexes. Use, modify, and distribute PostgreSQL for free, whether it is for private, commercial, or academic research.
I can’t run jobs on PGAgent on PostgreSQL.
I installed pgagent on Ubuntu 16.04.
I executed:
CREATE EXTENSION pgagent;
CREATE LANGUAGE plpgsql; According to this: https://www.pgadmin.org/docs/pgadmin4/1.x/pgagent_install.htm
<
PostgreSQL query is not terminated, the service postgreSQL is not started after reboot
In my work, I am running a complex query. I canceled it and went home yesterday. It is impossible to terminate the query later this morning. There is also a “after termination” “End” function. A co
PostgreSQL – Refreshing materialized view Concurrently causes table expansion
In PostgreSQL 9.5, I decided to create a materialized view “effect” and schedule hourly concurrent refreshes, because I want it to be always available:
< /p> REFRESH MATERIALIZED VIEW CONCURR
How to add time-related triggers in PostgreSQL?
Regarding how: I am confused and powerless:
>After setting up the database, add a trigger to the postgresql database, that is, add a trigger by clicking a hyperlink
>Write a trigger function
PostgreSQL – “INSERT INTO … FETCH All from …” unable to compile
I have some functions to return cursors (refcursor) on PostgreSQL 9.6:
CREATE OR REPLACE FUNCTION public.test_returning_cursor( )
RETURNS refcursor
IMMUTABLE
LANGUAGE plpgsql
AS $$
DECLARE
Deploy high performance PostgreSQL cluster
Postgres-XL is composed of three major components: the GTM (Global Transaction Manager), the Coordinator and the Datanode. Their features are given in the following sections. GTM (Global Transactio
PostgreSQL – How do I know the actual count in a big table of high insertion rates
Suppose I have a table with exactly 10M rows. I need to know the exact number of rows. It takes 5 seconds for COUNT requests. Suppose 100 rows are added to the table every second.
If I now re
How to sort in PostgreSQL via UUID?
Is there any order guarantee for using uuid_generate_v1() on postgresql?
If yes, it does not matter whether it is guaranteed to generate the UUID on each machine or on which machine? Since V1
PostgreSQL – Postgres unique constraint is not forced uniqueness
This is my constraint:
CREATE UNIQUE INDEX index_subscriptions_on_user_id_and_class_type_id_and_deleted_at
ON subscriptions
USING btree
(user_id, class_type_id, deleted_at); This query pr