Djoni Darmawikarta

If you are an R user who wants to move away from SQL and instead wants to manipulate data using the R's dplyr functions, then this book is perfect for you. dplyr is an R package available for download from the CRAN website, https: //cran.r-project.orgYou will learn the dplyr's equivalents of the SQL's DML statements (Data Manipulation Language): the SELECT, INSERT, UPDATE, and DELETE statements.

The book title implies that SQL Queries for R Users is for R users who need to get the data they need from a database. Loading large raw data from a database into R workspace is often unnecessary or even prohibitive. The book teaches you how to write SQL queries to retrieve precisely only the data needed from an SQL database. But, this book covers topics on metadata, which is equally important if not more than the SQL queries. To write an SQL query you must first know where the data is, the name of the tables and columns, their relationships, and the characteristics of the data. The book shows you how to identify this information. In Oracle SQL Developer ...... Explore Metadata Visualize Data Model Inquire Data Dictionary Build and Test Query Incrementally Wrap and Secure Query as Database View Deploy Generic SELECT query in R program

MySQL stored routines are programs you write and compile. They are then stored in the database. Other programs, and other users, who have the permission, can then use your routines.This book is for you if you want to learn MySQL's stored routines the easy way. By particularly following the book examples you will quickly gain practical skills.

PL/SQL is the Oracle Procedural Language extension of SQL. PL/SQL is integrated within the Oracle database. A PL/SQL program can have both SQL statements and procedural statements. In the program, the SQL statements are used to access sets of data stored in a database, while the procedural statements are used to process individual piece of data and control the program flow, by applying, for example, the PL/SQL's if-then-else and looping structures.This book, Oracle PL/SQL Programming Fundamentals By Examples, is for PL/SQL beginners. If you have no prior or limited skill of PL/SQL, and you want to learn the Oracle PL/SQL programming language the practical way, then this book is perfect for you.When you finish reading the book and trying its examples, you would have equipped yourself with PL/SQL fundamental skills to start writing some PL/SQL programs for a real-world development project.Source codes listing of the examples are included in the Appendix of the book.