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| контрольные ограничения | |||
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| проверочное ограничение (ssn) | |||
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| ограничение CHECK (A constraint that allows for business rules that span multiple tables. For example, the Order table could have a CHECK constraint that would prevent orders for a customer from exceeding a credit limit defined for the customer in the Customer table) | |||
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check constraints : 1 phrase in 1 subject |
| Programming | 1 |