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How to Extract First N or Last N Characters From a Column in PostgreSQL

We can extract the first and last n characters from a table column and use them as per our needs. This can be done by utilizing the LEFT() and RIGHT() functions of PostgreSQL.

How to Use inet_client_port() and inet_server_port() Functions in Postgres

The inet_client_port() function gives the IP port number of the current client and the inet_server_port() function returns the IP port number of the server

How to Drop a Tablespace in PostgreSQL

To drop a tablespace in Postgres, execute the DROP TABLESPACE statement followed by the name of the tablespace to be discarded.

How to Alter a Tablespace in PostgreSQL

To alter a tablespace in PostgreSQL, the “ALTER TABLESPACE” statement is used with “RENAME TO”, “OWNER TO”, and “SET” clauses.

How to Log Queries in PostgreSQL

To log queries in Postgres, first, locate the config file, then locate the data directory path. After that, configure the configurations and direct the output to the log file.

PostgreSQL UPDATE Vs. UPDATE...FROM - What's the Difference

The UPDATE statement updates the table's data with the new values provided in the query. While the UPDATE FROM statement updates a table's data in accordance with the values of the other table.

How to Write Case-Insensitive Queries in PostgreSQL

There are four methods to write the case-insensitive matching in PostgreSQL. Those are CITEXT extension, LOWER() function, ILIKE operator, and Case conversion.

How to Connect to PostgreSQL From Visual Studio Code

To Connect to PostgreSQL From VS Code, launch the VS Code, press “CTRL + Shift + X” to open the Extensions view, select the “PostgreSQL” extension, and Install” it.

How to Create, Update and Drop Tables in a PostgreSQL Docker Container

To create, update and drop tables in PostgreSQL container, build and run PostgreSQL container and connect with Database Server. Then, perform these operations.

PostgreSQL transaction_timestamp() Function

The transaction_timestamp() function returns the timestamp for the current transaction. This function does not need any argument.