Duplicate primary key

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Read committed и repeatable read. Duplicate primary key. Duplicate primary key. Sql запросы примари кей. Duplicate primary key.	Primary key и foreign key. Duplicate primary key. Разница между primary key и unique. Alter table для занесения значений в столбец. Duplicate primary key.
Duplicate primary key. Ограничение pk в sql server. Duplicate entry '2' for key 'uk_vedomost_kolvo_tovar'. Duplicate key value violates unique constraint. Duplicate primary key.
Duplicate primary key. Add column sql. Duplicate key value violates unique constraint. Duplicate entry. Ограничения первичного ключа.	Unique primary key. Duplicate primary key. Запрос в alter. Duplicate primary key. Duplicate primary key.
Duplicate primary key. Sql запросы примари кей. Alter table primary key. Duplicate primary key. Duplicate primary key.