An in-depth, by examples ,look to the forgotten powerful tool .The jsonb type, We will learn 'Jsonb' type true usefulness when we have complex tables with complex columns that contains composite data types, where conventional build of columns is of no use , and use of 'Jsonb' is the solution. In this book chapters we will get to know the: 1- Build of a jsonb . 2- The operators used in queries, and their uses. 3- How to run complex queries on columns with composite types. 4- How to run different types of functions on jsonb columns(creation, testing and processing functions). 5- Then we learn the powerful jsonb subscripting , that will makes complex data queries of composite types columns.. as easy as possible.