Postgres and Open Source Experts

There are various ways to start, stop, or restart the Postgres server on Windows, such as using the “net start” command, “pg_ctl” utility, or “services” manager.

A schema in database management systems represents a set of rules that regulate/handle a database. It is a logical structure that holds various database objects like views, tables, indexes, sequences, etc. In Postgres, “public” is a Default schema. So, by default, Postgres users can access the "public" schema and create objects in it, such as views, tables, etc.

The SET SEARCH_PATH command, however, allows a user to set any other …

In PostgreSQL, use the CREATE DATABASE command along with the “WITH TEMPLATE” parameter to copy or clone a database.

In PostgreSQL, conditional expressions are used to select one of the multiple values based on the Boolean condition.

Postgres supports a couple of native JSON operators to query the data from a JSON column. These operators include a short arrow “->” and a long arrow “->>”.

In PostgreSQL, the TO_TIMESTAMP() function is used to convert a Unix or Posix Timestamp to a date or time value.

The CASE statement is one of the conditional expressions that is used to create conditional queries. Postgres supports two forms of the CASE statement: A Searched CASE and a simple CASE.

The NOT EQUAL operator is one of the comparison operators that check if the input values are equal or not. It is symbolized as “!=” or “<>”.

Postgres offers various ways to convert a TIMESTAMP to a DATE, such as TO_CHAR() function, CAST operator, EXTRACT function, etc.

To get the Unix Timestamp in PostgreSQL, the EXTRACT() and DATE_PART() functions are used with the EPOCH argument.