Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is updated or ...
Violação da restrição UNIQUE KEY 'unique_constraint_tab21_01'. Não é possível inserir a chave duplicada no objeto 'dbo.tab21'. O valor de chave duplicada é (1 ...
> 原文:[https://www . geesforgeks . org/SQL-query-add-unique-key-constraints-using-alter-command/](https://www.geeksforgeeks.org/sql-query-to-add-unique-key ...
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