In SQL Server, charts are stored in the sysdiagrams table, which is created whenever a chart is created. The table definition is as follows.
CREATE TABLE [dbo].[sysdiagrams](
[name] [sysname] NOT NULL,
[principal_id] [int] NOT NULL,
[diagram_id] [int] IDENTITY(1,1) NOT NULL,
[version] [int] NULL,
[definition] [varbinary](max) NULL)
Along with the table, several stored procedures are also created.
- sp_alterdiagram
- sp_dropdiagram
- sp_creatediagram
- sp_renamediagram
- sp_helpdiagramdefinition
- sp_helpdiagrams
- sp_upgradediagrams
sp_helpdiagrams .