How to find column definition - Sql Server
The DataSet in ADO.NET represents a collection of data retrieved from a data source. It provides a disconnected data model, which means it can work with the data it contains independently of the original data source. This allows for offline data manipulation and processing.
The SqlDataAdapter object is used to populate a DataTable within a DataSet. It acts as a bridge between the data source and the DataSet, allowing you to retrieve data from the source and fill it into the DataTable. The Fill method of the SqlDataAdapter is used to populate the data from the data source into the DataSet.
The DataSet can contain more than one table at a time. Each table is represented by a DataTable object within the DataSet. A DataTable consists of rows and columns, where each row represents a record or data entry, and each column represents a specific attribute or field of that record. The data is organized in a tabular format, with rows and columns forming a structured representation of the data.Full Source VB.NET
DataSet provides a flexible and powerful means of working with data in a disconnected manner, allowing for efficient data retrieval, manipulation, and processing.