Salesforce Objects That Don’t Support DML Operations

Below Objects are don't support DML operations in salesforce.

• AccountTerritoryAssignmentRule
• AccountTerritoryAssignmentRuleItem
• ApexComponent
• ApexPage
• BusinessHours
• BusinessProcess
• CategoryNode
• CurrencyType
• DatedConversionRate
• NetworkMember (allows update only)
• ProcessInstance
• Profile
• RecordType
• SelfServiceUser
• StaticResource
• Territory2
• UserAccountTeamMember
• UserPreference
• UserTerritory
• WebLink

Create Object From Spreadsheet using Lightning Object Creator in Salesforce

Lightning Object Creator is a new tool to create an object from the spreadsheet.

Note: Make sure that Lightning Experience should be enabled in your org.

For Demo, I created a sample spreadsheet with columns.

Step 1:
Go to Setup | Object Manager | Select Custom Object from Spreadsheet
                      OR
you can directly access the tool using below link
https://object-creator.salesforce.com/

Step 2
Upload spreadsheets from Microsoft Excel, Google Sheets, or comma-separated value (CSV) files.

Step 3
Salesforce will automatically detect the fields and populate all its record data from Spreadsheet. You can customize the Salesforce field name and field type or leave them as suggested.

Step 4
Define object Properties and click finish

Result