Excel:
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CREATE FOREIGN TABLE Sheet1 (
	ROW_ID integer OPTIONS (SEARCHABLE 'All_Except_Like', "teiid_excel:CELL_NUMBER" 'ROW_ID'),
	FirstName string OPTIONS (SEARCHABLE 'Unsearchable', "teiid_excel:CELL_NUMBER" '1'),
	LastName string OPTIONS (SEARCHABLE 'Unsearchable', "teiid_excel:CELL_NUMBER" '2'),
	Age double OPTIONS (SEARCHABLE 'Unsearchable', "teiid_excel:CELL_NUMBER" '3'),
	CONSTRAINT PK0 PRIMARY KEY(ROW_ID)
) OPTIONS ("teiid_excel:FILE" 'names.xlsx', "teiid_excel:FIRST_DATA_ROW_NUMBER" '2');

Salesforce:
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CREATE FOREIGN TABLE AccountHistory (
	Id string(18) NOT NULL AUTO_INCREMENT OPTIONS (NATIVE_TYPE 'id', calculated 'false', custom 'false', defaultedOnCreate 'true'),
	IsDeleted boolean OPTIONS (NATIVE_TYPE 'boolean', calculated 'false', custom 'false', defaultedOnCreate 'true'),
	AccountId string(18) OPTIONS (NATIVE_TYPE 'reference', calculated 'false', custom 'false', defaultedOnCreate 'false'),
	Field string(255) OPTIONS (NATIVE_TYPE 'restrictedpicklist', calculated 'false', custom 'false', defaultedOnCreate 'false', picklistValues 'accountMerged,AccountNumber,AccountSource,Active__c,AnnualRevenue,BillingAddress,BillingCity,BillingCountry,BillingLatitude,BillingLongitude,BillingPostalCode,BillingState,BillingStreet,created,accountCreatedFromLead,CustomerPriority__c,Description,Fax,feedEvent,Industry,Jigsaw,accountUpdatedByLead,personAccountUpdatedByLead,Name,NumberOfEmployees,NumberofLocations__c,Owner,ownerAccepted,ownerAssignment,Ownership,Parent,Phone,Rating,locked,unlocked,ShippingAddress,ShippingCity,ShippingCountry,ShippingLatitude,ShippingLongitude,ShippingPostalCode,ShippingState,ShippingStreet,Sic,SicDesc,Site,SLA__c,SLAExpirationDate__c,SLASerialNumber__c,TextName,TickerSymbol,Type,UpsellOpportunity__c,Website'),
	OldValue string(255) OPTIONS (NATIVE_TYPE 'anyType', calculated 'false', custom 'false', defaultedOnCreate 'false'),
	NewValue string(255) OPTIONS (NATIVE_TYPE 'anyType', calculated 'false', custom 'false', defaultedOnCreate 'false'),
	CONSTRAINT Id_PK PRIMARY KEY(Id),
	CONSTRAINT FK_Account_AccountId FOREIGN KEY(AccountId) REFERENCES Account (Id)
) OPTIONS (custom 'false', supportsCreate 'false', supportsDelete 'false', supportsMerge 'false', supportsQuery 'true', supportsReplicate 'true', supportsRetrieve 'true', supportsSearch 'false');