Tag: unique-constraint

• SQLite: Handling Unique Constraints on Composite Keys with NULL Values
• SQL Server 2019: implementing Unique Constraints on Composite Keys When Inserting Data
• Unexpected Duplicate Rows When Using INSERT IGNORE with a Unique Constraint in MySQL 5.7
• Handling Duplicate Entries with Django's UniqueConstraint and Bulk Create
• PostgreSQL: Unexpected 'duplicate key' scenarios during bulk insert despite unique index
• MySQL 8.0: guide with UNIQUE index not preventing duplicate entries in INSERT ... ON DUPLICATE KEY UPDATE
• MySQL 8.0: implementing INSERT IGNORE optimization guide as expected with unique constraints
• SQL Server 2017: Difficulty handling unique constraint violation during upsert with MERGE statement