Import data into SQL Server with differences in some column - sql

Question

I have an Excel file that I imported into a table (with customerID, Customer name, accountID, Address, and accountmanagerID) in my SQL Server database.
Now I want to split the data into different tables, for customers, accounts, address, and managers.
The issue is that some customers have more then 5 accounts with different managers others with 2 different account with the same manager.
If I use the stored procedure shown here, I can only store one customer with one account.
But what I want to do is to store one customer with all the different accounts related to him.
This is my stored procedure:
ALTER PROCEDURE [dbo].[sp_Import_Client]
AS
BEGIN
TRUNCATE TABLE Customers
TRUNCATE TABLE Addresses
TRUNCATE TABLE Accounts
TRUNCATE TABLE Managers
DECLARE NewClient CURSOR LOCAL FAST_FORWARD READ_ONLY
FOR
SELECT
Distinct(CustomerName), --CustomerName
AccountID , --AccountNo
Address,
ManagerName -- manager
FROM
OldDetails
DECLARE #CustomerName VARCHAR(255)
DECLARE #Contact VARCHAR(300)
DECLARE #AccountNo VARCHAR(20)
DECLARE #Address1 VARCHAR(300)
DECLARE #CustomerID INT
OPEN NewClient
FETCH FROM NewClient INTO #CustomerName, #Manager, #AccountNo, #Address1
WHILE (##FETCH_STATUS = 0)
BEGIN
--- 1 Insert Customer
INSERT INTO Customers (CustomerName)
VALUES (#CustomerName)
---Set the CustomerID to continue with stage 2
SET #CustomerID = SCOPE_IDENTITY()
--- 2 Insert CustomerAddresses
INSERT INTO Address (CustomerID, Address1)
VALUES (#CustomerID, #Address1)
---3 Insert Managers
INSERT INTO Managers (CustomerID, Name)
VALUES (#CustomerID, #Contact)
---4 Insert Account
INSERT INTO Accounts(CustomerID, AccountNo, Manager)
VALUES (#CustomerID, #AccountNo, #manager)
FETCH NEXT FROM NewClient INTO #CustomerName, #Manager, #AccountNo, #Address1
END
CLOSE NewClient
DEALLOCATE NewClient
END

Answer 1

I think you might need to change the step 1 in your procedure to check if the customer already exists, and if it does, use it instead of inserting a new row for it. You can use the code block below instead of your INSERT statement:
-- SET THE #CustomerID
SET #CustomerID = NULL
SELECT #CustomerID = ID
FROM Customers
WHERE CustomerName = #CustomerName
IF #CustomerID IS NULL
BEGIN
--- 1 Insert Customer
INSERT INTO Customers (CustomerName)
VALUES (#CustomerName)
---Set the CustomerID to continue with stage 2
SET #CustomerID = SCOPE_IDENTITY()
END
This way, you can save only 1 customer record, and multiple rows for managers / accounts if needed.
Hope it makes sense.
EDIT
By the way, a small observation, you dont need to specify FAST_FORWARD and READ_ONLY together because FAST_FORWARD implies READ_ONLY and FORWARD_ONLY, so FAST_FORWARD will do it.