Sql Server - View the View structure

Question

I executed the following commands in the Sql Server database:

comando 1:
SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'vendas'

resultado 1:
TABLE_CATALOG     TABLE_SCHEMA     TABLE_NAME      TABLE_TYPE    
----------------  ---------------  --------------  ------------- 
Empresa 1         dbo              vendas          VIEW

comando 2:
SELECT * FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_NAME = 'vendas'

resultado 2:
TABLE_CATALOG     TABLE_SCHEMA     TABLE_NAME      VIEW_DEFINITION     CHECK_OPTION     IS_UPDATABLE    
----------------  ---------------  --------------  ------------------  ---------------  --------------- 
Empresa 1         dbo              vendas          (null)              NONE             NO

comando 3:
SELECT definition FROM sys.objects O JOIN sys.sql_modules M ON M.object_id = O.object_id WHERE O.object_id = object_id( 'dbo.vendas') AND O.type = 'V'

resultado 3:
definition    
------------- 
(null)

My doubts are

• The table is really a view, or this is just a description for some other kind of table Material

• How to get more information about this table if it is a view, which tables build it ?

• The lack of definition information could be lack of user privilege, how to discover this ?

Edited:

To documentation of Microsoft shows that the column sys.sql_modules.definition may be encrypted.

Answer 1

Table is even a view, or is this just a description for some other kind of Material table

Is a view yes. If it is a description, it will depend on its content.

How to get more information about this table if it is a view, which tables build it ?

Use the command sp_helptext vendas.

The lack of definition information could be lack of user privilege, how to discover this ?

Running the above command with a user without access permission will make SQL Server return an error message warning of this lack of permission.