Postgres and Open Source Experts

In Postgres, the meta-commands like “\d”, “\dt”, “\dv”, “\ds”, and “\df” are used to describe relations, tables, views, sequences, and functions, respectively.

A database object is an entity defined in a database and is used to store or reference data. In Postgres, database objects are created using the CREATE command.

The ARRAY_UPPER() function in PostgreSQL returns the upper bound of the array dimension or the highest index of an array.

The PostgreSQL stores data and there are a lot of chances that the data being recorded might contain NULL values. The root cause of these NULL values may be some discrepancies in the system generating the data or maybe due to inefficient/incorrect data entry. The JSONB is a widely used data type in Postgres that stores an immense range of textual data in the form of key-value pairs. So the …

The Postgres jsonb_to_record() function takes a top-level JSONB object, converts it into a table record/row, and returns it.

The json_populate_record() function in Postgres converts the JSON object into a data row. It populates the table record from the JSON object.

The JSONB object is provided to the jsonb_object_keys() function as an argument and it returns a column containing all the keys present in that particular JSONB object.

The jsonb_pretty() function returns the beautified version of the provided JSONB value. This function applies proper formatting to the given value.

The jsonb_insert() function inserts a new JSONB value into an already existing JSONB object at a specific location. It takes in 3 parameters essentially and 1 parameter optionally.

The to_ascii() function in PostgreSQL converts the provided string from any valid encoding to the ASCII encoding.