Mastering Microsoft Dynamics 365 Business Central

Deploying the main extension

To make it very simple, we will create a brand new table (Tab50105.NewTable.al) with a few fields in it: 

table 50105 "NewTable"{    DataClassification = ToBeClassified;   fields     {        field(1;"Entry No."; Integer)        {          DataClassification = ToBeClassified;        }        field(2;"Description"; Text [30] )        {           DataClassification = ToBeClassified;        }        field(3; "Posting Date"; Date)         {           DataClassification = ToBeClassified;          }        field(4; "Open"; Boolean)        {          DataClassification = ToBeClassified;          }     }      keys      {         key(PK; "Entry No.")          {              Clustered = true;          }      }}

Then, we create a table extension (Tab-Ext50105.NewTableExtension.al) that extends the standard Item table with a new field called Catalogue No.:

tableextension 50105 "New Table Extension" extends Item ...