How to set unique in navicat

Create a unique index for the table: Open Navicat and select the target database. Select the table to which you want to add a unique index and open the Indexes tab. Create a new index and set the index name, check the Unique checkbox, select the columns containing unique keys, and the sort order. Apply changes to create an index that ensures that the specified combination of columns is unique for each row in the table.

How to set a unique index using Navicat

Step 1: Open Navicat and select the database

Start Navicat and connect to the target database.

Step 2: Select the table and open the Index tab

In the Object Browser, select the table on which you want to create a unique index. Then click on the Index tab.

Step 3: Create a new index

In the Index tab, click the Create Index button.

Step 4: Set Index Properties

In the Index dialog box, set the following properties:

• Index Name :Enter the name of the index.
• Unique: Check this checkbox to create a unique index.
• Columns: Select columns that contain unique keys.
• Sort order: Select the sort order of the columns (ascending or descending).

Step 5: Apply changes

Click the OK button to create the index.

Other notes:

• Unique indexes ensure that the specified column combinations are unique for each row in the table.
• If you insert or update a record in the table that violates the unique index, the operation will fail.
• Multiple unique indexes can be created to enforce uniqueness constraints.

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