Insert into table variable from SP in SQL

Question

My store procedure returns / select 3 tables after execution.

 

How can I insert only 1st table in table variable in SQL?

 

The below code is I am using  

declare @myTable as table
(
 A_Name nvarchar(128),
 A_Id nvarchar(128),
 A_Total varchar(128)
 --- more columns
)

INSERT INTO @myTable
EXEC 'sp_helpdb' 'Param1'

 Thanks in advance