Question: TABLE COLUMN NULL/NOT NULL ALTERNATE KEY? SHIPMENT ShipmentID SHIPMENT ShipperID SHIPMENT PurchasingAgentID SHIPMENT ShipperInvoiceNumber SHIPMENT Origin SHIPMENT Destination SHIPMENT ScheduledDepartureDate SHIPMENT ActualDepartureDate SHIPMENT EstimatedArrivalDate TABLE
| TABLE | COLUMN | NULL/NOT NULL | ALTERNATE KEY? |
| SHIPMENT | ShipmentID |
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| SHIPMENT | ShipperID |
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| SHIPMENT | PurchasingAgentID |
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| SHIPMENT | ShipperInvoiceNumber |
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| SHIPMENT | Origin |
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| SHIPMENT | Destination |
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| SHIPMENT | ScheduledDepartureDate |
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| SHIPMENT | ActualDepartureDate |
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|
| SHIPMENT | EstimatedArrivalDate |
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| TABLE | COLUMN | NULL/NOT NULL | ALTERNATE KEY? |
| SHIPMENT_ITEM | ShipmentID |
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| SHIPMENT_ITEM | ShipmentItemID |
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| SHIPMENT_ITEM | PurchaseItemID |
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|
| SHIPMENT_ITEM | InsuredValue |
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