ECSD_DEF is a standard SAP Table which is used to store Table for Defining System Data Containers data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The ECSD_DEF table consists of various fields, each holding specific information or linking keys about Table for Defining System Data Containers data available in SAP. These include FUSER (Created by), FDATE (Created on), FTIME (Created at), FRELEASE (Release of SAP System)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .