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How do I remove a unique key?
In Object Explorer, right-click the table with the unique constraint, and click Design. On the Table Designer menu, click Indexes/Keys. In the Indexes/Keys dialog box, select the unique key in the Selected Primary/Unique Key and Index list. Click Delete.
How do I delete a key in MySQL?
To drop a non-primary key index, use the DROP INDEX command: DROP INDEX index_name ON table_name; The syntax requires the table name to be specified because MySQL allows index names to be reused on multiple tables. Primary keys in MySQL are always named PRIMARY (not case sensitive).
How do I change the unique key in MySQL?
Following are the syntax of the ALTER TABLE statement to add a unique key: ALTER TABLE table_name ADD CONSTRAINT constraint_name UNIQUE(column_list);
What is ADD key in MySQL?
As per MySql documentation, KEY is normally a synonym for INDEX. The key attribute PRIMARY KEY can also be specified as just KEY when given in a column definition. This was implemented for compatibility with other database systems. In your case ADD KEY will explicitly define index on that field.
How do I remove a unique key in SQL?
The syntax for dropping a unique constraint in MySQL is: ALTER TABLE table_name DROP INDEX constraint_name; table_name.
How do I remove a primary key from a column?
To delete a primary key constraint using Table Designer. In Object Explorer, right-click the table with the primary key, and click Design. In the table grid, right-click the row with the primary key and choose Remove Primary Key to toggle the setting from on to off.
How to remove unique key from mysql table?
To remove the unique key from MySQL, use the DROP command. The syntax is as follows − To understand the above syntax, let us create a table with the unique key. The query to create a table is as follows − Now you can check what is the key name with the help of show command. This unique key will get deleted.
How do I add a unique key to a container?
Open the Data Explorer pane and select the container that you want to work on. Click on New Container. In the Add Container dialog, click on + Add unique key to add a unique key entry. Enter the path (s) of the unique key constraint. If needed, add more unique key entries by clicking on + Add unique key.
How to create a unique key in Java?
When creating a new container using the .NET SDK v3, use the SDK’s fluent API to declare unique keys in a concise and readable way. When creating a new container using the Java SDK, a UniqueKeyPolicy object can be used to define unique key constraints.