Содержимое

# Мастер таблиц - Задать первичный ключ

Specifies a field in the table to be used as a primary key.

## Create a primary key

Select to create a primary key. Add a primary key to every database table to uniquely identify each record. For some database systems within LibreOffice, a primary key is mandatory for editing the tables.

### Automatically add a primary key

Select to automatically add a primary key as an additional field.

### Use an existing field as a primary key

Select to use an existing field with unique values as a primary key.

#### Имя поля

Выберите имя поля.

#### Автозначение

Select to automatically insert a value and increment the field's value for each new record. The database must support automatic incrementation in order to use the Auto value feature.

### Define primary key by several fields

Select to create a primary key from a combination of several existing fields.

#### Доступные поля

Select a field and click > to add it to the list of primary key fields.

### >

Нажмите, чтобы переместить выбранные поля в поля, на которые указывает стрелка.

### <

Нажмите, чтобы переместить выбранные поля в поля, на которые указывает стрелка.

#### Поля первичного ключа

Select a field and click < to remove it from the list of primary key fields. The primary key is created as a concatenation of the fields in this list, from top to bottom.

Мастер таблиц - Создать таблицу

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