Question

MS AccessЧто такое ключ?А. Одно или несколько полей, однозначно определяющих записи в таблицеВ. Поле, содержащее номера записей в таблицеС. Поле. значения которого вычисляются по формулеD. Поле или несколько полей, взятых из других таблицЕ. Запись, содержащая номера строк в таблице

Answer 1

Ответ А. Одно или несколько полей, однозначно определяющих записи в таблице.

Answer 2

What is a key in MS Access?

A key in MS Access refers to one or more fields that uniquely identify records in a table. It helps in establishing relationships between tables and ensures data integrity. There are different types of keys in MS Access, including primary keys, foreign keys, and composite keys.

A. One or more fields, uniquely identifying records in a table: A key can consist of one or more fields that uniquely identify each record in a table. This is known as a primary key. The primary key ensures that each record in the table has a unique identifier, and it is used to establish relationships with other tables.

B. A field containing record numbers in a table: This statement is not accurate. While a key can be used to identify records, it is not necessarily a field containing record numbers. The primary key can be any field or combination of fields that uniquely identifies each record.

C. A field whose values are calculated using a formula: This statement is not accurate. A key is not a field whose values are calculated using a formula. It is used to uniquely identify records and establish relationships between tables.

D. A field or multiple fields taken from other tables: This statement is not accurate. While a foreign key can reference a field from another table, it is not the definition of a key itself. A key is used to uniquely identify records within a table.

E. A record containing row numbers in a table: This statement is not accurate. A key is not a record containing row numbers in a table. It is used to uniquely identify records within a table.

To summarize, a key in MS Access is one or more fields that uniquely identify records in a table, helping to establish relationships and ensure data integrity.