Postgres and Open Source Experts

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

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.

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.

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

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.

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

The starts_with() function takes a string and checks whether that string starts with another specified string passed as an argument in the function and returns a boolean.

RAISE NOTICE is used to raise an error and report a message and that error is reported back to the user. It is followed by a format that is basically the string we want to show to the user.

The strpos() is a built-in function in PostgreSQL that is used to determine the position/location of a sub-string in a main string.

The SELECT LIMIT statement is used to limit data up to a specified number of rows. The number of rows has to be specified after the LIMIT keyword.