Practice coding in PostgreSQL. Load the open source PostgreSQL and give the problems in this workbook a try. The data can be easily typed into Excel because they are short tables for this purpose. Otherwise, the excel.csv tables can be found on the author's GitHub page. This book contains questions and then answers which show the code and output. Practice SQL with commands select, insert, alter, add, update, delete, where, create, values, add primary key, limit, type, add column, order by, and more!!