The SAP Product Versions listed in the tables below are supported by support package stacks. Each support package stack has a leading software component version. The support package level of this particular component version is a key part of the stack. SAP R3 Transaction Codes - Tcode By Functional Modules When a User accesses a Transaction in the SAP R/3 system: a) A Query is performed in SQL from the Application level to the database level.
SAP Tutorial
SAP Basic Tutorial for Beginners – Learn ERP SAP R/3 software in an easy and simple methods with real time scenarios starting basics to advanced concepts.

SAP is the name of German based software company founded by four former IBM employees. The acronym SAP is abbreviated as “System, Applications and Products in Data Processing.
Audience
This SAP training tutorials are especially designed for all beginning learners and professionals who want to gain their knowledge on SAP R/3.
Perquisites
As this SAP tutorials are designed from basic concepts, so you do not need knowledge on any software, but basic understanding of what is SAP & What is ERP helps to learn SAP more better.
SAP Tutorials
Following is the list of module wise SAP Tutorials.
SAP TCodes & Tables
Sap Instructions Manual
SAP Menu Paths
Sap R3 Architecture
SAP Menu navigation paths for all the items in SAP Customizing Implementation Guide.
