Experts in Postgres and Open Source Infrastructure

FIRST_VALUE() is one of the Window functions in Postgres that retrieves the first value in the sorted partition of a result set.

In PostgreSQL, a built-in function named “JSONB_ARRAY_LENGTH()” is used to determine the length of a JSONB array.

JSON_TYPEOF() is a built-in JSON function that accepts any valid SQL value and retrieves its data type in text format.

In PostgreSQL, the TO_JSONB() is a built-in JSON function that accepts any SQL value as an argument and converts it to JSONB format.

In PostgreSQL, the ROW_TO_JSON() is a built-in JSON function that accepts any valid SQL composite type value and converts it into a JSON object.

In PostgreSQL, the TO_JSON() is a built-in JSON function that accepts any SQL value as an argument and converts it to JSON format.

In PostgreSQL, the CUME_DIST() function retrieves the cumulative distribution of a value for the given set of values.

The ENUM_LAST() is a built-in function in Postgres that retrieves the last value of the enum specified by the parameter.

The ENUM_FIRST() is a built-in function in Postgres that retrieves the first value of the enum specified by the parameter.

The JSON_BUILD_OBJECT() function is used to create and retrieve a JSON object from a variadic parameter list of key-value pairs.