There is no % ROWTYPE function on sql server what you have to do is save your data in variables or you can create a table variable as follows:
declare @variable tabla (col1 int,col2 int)
insert into @Fields
select col1,col2
from tabla1
SELECT * from @variable
or declaring varibles in this way:
DECLARE @External_ID AS BIGINT = NULL;
DECLARE @PlatformID AS INT = NULL;
DECLARE @ActorIDOfReseller AS INT = NULL;
DECLARE @ActorIDOfClient AS INT = NULL;
DECLARE @ActorIDOfExtension AS INT = NULL;
DECLARE @CallType AS NCHAR (10) = NULL;
DECLARE @CallInitiatedDate AS DATE = NULL;
DECLARE @CallInitiatedTimeHH24MI AS TIME (0) = NULL;
DECLARE @TimePeriodID AS INT = NULL;
DECLARE @CallAnswered AS DATETIME = NULL;
DECLARE @CallAnsweredYN AS BIT = NULL;
DECLARE @CallDispositionID AS INT = NULL;
DECLARE @CountryID AS INT = NULL;
DECLARE @CallPrefixID AS INT = NULL;
DECLARE @FromNumber AS VARCHAR (32) = NULL;
DECLARE @ToNumber AS VARCHAR (80) = NULL;
DECLARE @CallDuration AS INT = NULL;
DECLARE @CallCostToExtension AS DECIMAL (10, 6) = NULL;
DECLARE @CallCostToClient AS DECIMAL (10, 6) = NULL;
DECLARE @CallCostToReseller AS DECIMAL (10, 6) = NULL;
DECLARE @CallCostToAdmin AS DECIMAL (10, 6) = NULL;
DECLARE @Flow AS VARCHAR (3) = NULL;
DECLARE @CallStart AS DATETIME = NULL;
DECLARE @MoneyUnit AS VARCHAR (32) = NULL;
DECLARE @Prefix AS VARCHAR (32) = NULL;
DECLARE @External_CallID AS VARCHAR (255) = NULL;