Do you want to merge the result of the two stored procedures into a single result? Then try this
IF OBJECT_ID('tempdb..#result')
DROP TABLE #result
CREATE TABLE #result
(
datefrom DATETIME NULL,
dateto DATETIME NULL,
accountId INT NULL
)
INSERT INTO #result
(
datefrom,
dateto,
accountId
)
EXEC firstProcedure @param1,@param2
INSERT INTO #result
(
datefrom,
dateto,
accountId
)
EXEC secondProcedure @param1,@param2
SELECT *
FROM #result