The JSON_ARRAY_ELEMENTS_TEXT() is a built-in JSON function that accepts a JSON array as an argument and expands its top-level elements into a set of text values.
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How to Run PostgreSQL and pgAdmin Using Docker
To run PostgreSQL and pgAdmin using Docker, download Postgres and pgAdmin4 images from Docker Hub. Then, build and start the Postgres and pgAdmin4 containers.
How to Use NTH_VALUE Function in PostgreSQL
The NTH_VALUE function in PostgreSQL is used to get the Nth_value from the table using the column and offset to set the value from the column.
How to Install PostgreSQL Using Docker Compose
To install PostgreSQL using Docker Compose, specify the desired services in compose file. Then, start the compose service to build and run Postgres container.
How to Get the Name of the Current User in PostgreSQL
In PostgreSQL, the “CURRENT_USER”, “CURRENT_ROLE”, and “USER” methods are used to get the details of the current user.
What Does SETVAL() Function Do in PostgreSQL?
In PostgreSQL, SETVAL() is one of the sequence functions that resets the current value of the selected sequence and retrieves the specified value.
How to Create a PostgreSQL Database in Docker
To create a PostgreSQL database in Docker, use the “CREATE DATABASE <database-name>;” command. Then, create a new table in it and insert values in the table.
How to Check/Find the Hostname and Port Number in PostgreSQL
In PostgreSQL, several methods are used to check/find the hostnames and port numbers, such as the “\conninfo” command, the “pg_settings” view, etc.
How Do I Get the List of Existing Stored Procedures in PostgreSQL
To get the list of all stored procedures in a database, the “\df” command, “pg_proc” catalog, and “information_schema.routines” view are used in Postgres.
How to Check if a Table Exists in Postgres Database Using a User-Defined Function
In PostgreSQL, a user-defined function can be created that accepts the table name and schema name as arguments.
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