Help defining the correct relationship between two tables
simply you should have these Tables


Customer: Which Represents some information about your Clients
Order: Which Represents Information about the Orders your customers are making, of course you should have a CustomerID field in this table which references Customer(CustomerID)
Table:  each Restaurant can have some Tables which you are storeing information about Tables in this [Database table]
OrderTables : in order to Relate Orders with Tables you should use  this Table which you will have a structure as {OrderID , TableID} in this Table 
so it will be a one-to-many Relation