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Learn how to use the DROP CONSTRAINT command to delete a UNIQUE, PRIMARY KEY, FOREIGN KEY, or CHECK constraint from a table. See examples for SQL Server, Oracle, MS Access, and MySQL.
- Drop Database
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- Drop Database
20 Ιουν 2022 · Learn how to use the DROP CONSTRAINT statement to remove a constraint from a table in SQL Server. See examples of primary key, unique, default and check constraints and how to delete them.
11 Σεπ 2023 · Learn how to remove constraints from columns of a table in SQL using the DROP CONSTRAINT command. See syntax, examples and FAQs for unique, primary key, foreign key and check constraints.
2 Ιαν 2013 · The simplest way to remove constraint is to use syntax ALTER TABLE tbl_name DROP CONSTRAINT symbol; introduced in MySQL 8.0.19: As of MySQL 8.0.19, ALTER TABLE permits more general (and SQL standard) syntax for dropping and altering existing constraints of any type, where the constraint type is determined from the constraint name
4 Νοε 2022 · Learn how to use SQL drop constraint with ALTER TABLE statement to remove UNIQUE, PRIMARY KEY, FOREIGN KEY, or CHECK constraints from a table. See syntax and examples for SQL Server, Oracle and MySQL databases.
Learn how to use the DROP CONSTRAINT statement to remove a constraint from a table in SQL Server. See the syntax, examples, and types of constraints (except primary key) that can be dropped.
12 Οκτ 2024 · Learn how to use SQL ALTER TABLE DROP CONSTRAINT to remove data integrity constraints such as PRIMARY KEY, UNIQUE, and FOREIGN KEY. See syntax and examples for different database platforms.
