To get the name of the current database in PostgreSQL, you can use the following SQL query:
SELECT current_database();When you execute this query, it will return the name of the database that you are currently connected to.
For example, if you are connected to a database named “my_database,” executing the query will return “my_database” as the result.
The log_rotation_size parameter determines the size at which PostgreSQL’s log files (usually the log file generated by the pg_log system) will be rotated or switched to a new file. Rotating log files helps postgresql database engine to manage the log file size and prevent them from growing too large, which can be particularly useful for…
To describe a table in PostgreSQL and retrieve information about its columns and data types, you can use the \d command in the psql command-line tool or execute a SQL query. Here are two common methods to describe a table: Method 1: Using \d in psql (Command-Line Tool): Open a terminal and start the psql…
To extract the month from a date in PostgreSQL, you can use the EXTRACT function. Here’s an example: SELECT EXTRACT(MONTH FROM your_date_column) AS month FROM your_table; where your_date_column is the name of your date column and your_table is the name of your table. In this query, EXTRACT(MONTH FROM your_date_column) is used to extract the month…
You can create a view using the CREATE VIEW statement in PostgreSQL database. A view is a virtual table that is based on the result of a SELECT query. Views allow you to present a subset of data from one or more tables in a structured way, making it easier to query and retrieve specific…
To list the materialized views in a PostgreSQL database, you can query the system catalog tables. Materialized views are stored as objects in the database, and you can query the catalog to retrieve information about them. Here’s a query to list all materialized views in a PostgreSQL database: SELECT schemaname, matviewname FROM pg_matviews; Above query…
To get the month name from a date in PostgreSQL, you can use the TO_CHAR function with the appropriate format pattern. Here’s an example: SELECT TO_CHAR(your_date_column, ‘Month’) AS month_name FROM your_table; Replace your_date_column with the name of your date column and your_table with the name of your table. In this query, TO_CHAR is used to…