Postgres and Open Source Experts

In Postgres, the RANDOM() is an in-built function that generates a random numeric value between “0(inclusive)” and “1(exclusive)” or between a specific range.

To format a timestamp, specify a timestamp and a valid format as arguments to the Postgres TO_CHAR() function.

Postgres allows us to set a TIMESTAMP as the column’s default value. For this purpose, the DEFAULT keyword is used with the column name at the time of table creation.

To compare arrays in PostgreSQL, the equality operators, ordering operators, containment operators, and overlap operators are used.

In PostgreSQL, to extract epoch time from the current or specific time, the EXTRACT() function is used with the EPOCH argument.

To check the PostgreSQL version in Ubuntu, use the "SQL Shell" (psql) tool, “pg_config”, “dpkg”, or “apt-cache” commands.

In PostgreSQL, the “+” operator is used to add minutes to the current or specific DateTime values. Where the DateTime value can be a date, interval, time, or timestamp.

In Postgres, various tools, such as the “SQL Shell”, “pgAdmin”, and “Command Prompt” are used to connect to a Postgres database server.

In Postgres, the “-” operator and the AGE() function are used to find the date difference. The “-” operator returns an integer while the AGE() function returns an interval.

In PostgreSQL, use the RETURNING clause with the UPDATE, DELETE, or INSERT commands to return the modified rows.