I cannot manage to insert multiple rows when having multiple fields to get data from - tsql

Question

I ran into a problem with regards to trying to insert multiple rows in a table at once. I know it sounds easy, but here is the twist. The procedure itself gets data from a trigger, and the trigger returns a number of rows. So i need to make 1 insert statement to insert those rows and some other data. here is the code:
CREATE PROCEDURE [a01].[usp_raiseFriendAlerts]
(#AccountA UNIQUEIDENTIFIER, #AccountB UNIQUEIDENTIFIER)
AS
BEGIN
DECLARE #typeID TINYINT;
DECLARE #notificationID UNIQUEIDENTIFIER = NEWID();
DECLARE #accountAName NVARCHAR(356);
DECLARE #accountBName NVARCHAR(356);
SET #typeID = ( SELECT typeID
FROM [a01].[tbl_notificationTypes]
WHERE typeName = 'Added friend');
SET #accountAName = ( SELECT accountUsername
FROM [a01].[tbl_userAccounts]
WHERE accountID = #AccountA);
SET #accountBName = ( SELECT accountUsername
FROM [a01].[tbl_userAccounts]
WHERE accountID = #AccountB);
DECLARE #AccountIDZZ UNIQUEIDENTIFIER;
SET #AccountIDZZ = (SELECT friendAccountID
FROM [a01].[udf_getAddedFriendContacts](#AccountA, #AccountB)
EXCEPT
SELECT targetAccountID
FROM [a01].[tbl_blockedAccounts]);
INSERT INTO [a01].[tbl_notificationsInbox] (notificationID, notificationMessage, notificationDate, accountID, typeId)
VALUES (#notificationID, #accountAName + ' is now friends with ' + #accountBName, SYSDATETIMEOFFSET(), #AccountIDZZ , #typeID)
END;
GO

Answer 1

Try this:
CREATE PROCEDURE [a01].[usp_raiseFriendAlerts]
(
#AccountA UNIQUEIDENTIFIER
, #AccountB UNIQUEIDENTIFIER
)
AS
BEGIN
DECLARE #typeID TINYINT
, #notificationID UNIQUEIDENTIFIER = NEWID()
, #accountAName NVARCHAR(356)
, #accountBName NVARCHAR(356)
, #AccountIDZZ UNIQUEIDENTIFIER;
SELECT #typeID = typeID
FROM [a01].[tbl_notificationTypes]
WHERE typeName = 'Added friend';
SELECT #accountAName = accountUsername
FROM [a01].[tbl_userAccounts]
WHERE accountID = #AccountA;
SELECT #accountBName = accountUsername
FROM [a01].[tbl_userAccounts]
WHERE accountID = #AccountB;
INSERT INTO [a01].[tbl_notificationsInbox]
(
notificationID
, notificationMessage
, notificationDate
, accountID
, typeId
)
SELECT #notificationID
, #accountAName + ' is now friends with ' + #accountBName
, SYSDATETIMEOFFSET()
, AIDZZ.accountID
, #typeID
FROM (
SELECT friendAccountID AS 'accountID'
FROM [a01].[udf_getAddedFriendContacts](#AccountA, #AccountB)
EXCEPT
SELECT targetAccountID AS 'accountID'
FROM [a01].[tbl_blockedAccounts]
) AS AIDZZ
END;
GO