What is the primary key of the customer table?

Question

Notice that the customer number column is the primary key of the customers table and that the same column is a foreign key in the orders table. The customer number column in orders therefore serves to relate orders to the customers to which they belong.

Is customer name a primary key?

Customer_ID alone cannot be a primary key as a single customer can place more than one order thus more than one rows of same Customer_ID value.

How do I find the primary key in a table?

Primary Keys. The primary key of a table is the column whose values are different in every row. Because they are different, they make each row unique. If no one such column exists, the primary key is a composite of two or more columns whose values, taken together, are different in every row.

What is a primary key with example?

A primary key is a column -- or a group of columns -- in a table that uniquely identifies the rows of data in that table. For example, in the table below, CustomerNo, which displays the ID number assigned to different customers, is the primary key.

Which column is the primary key of the table?

A primary key uniquely identifies a row in a table. You cannot store NULL or duplicate values in a primary key column. In the Books table, BookId column is the primary key. Similarly, in the Authors table, AuthorId is the primary key.

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