How to get foreign keys in Navicat

Steps to create foreign keys using Navicat: Determine the table and its primary key and foreign key columns. Open Navicat and connect to the database. Edit the foreign key table and add foreign keys. Select the primary key table and map the primary key and foreign key columns. Configure foreign key constraints, including update and delete rules. Complete and apply changes.

How to use Navicat to create foreign keys

1. Determine the primary key and foreign key

First, identify the tables to which the relationship is to be established and the primary key and foreign key columns in each table. A primary key is a column that uniquely identifies each row in a table, while a foreign key is a column that references a primary key in another table.

2. Open Navicat and connect to the database

After connecting to the database containing the relevant tables, open the database in Navicat.

3. Edit the foreign key table

Right-click the table containing the foreign key column and select Edit.

4. Add foreign key

In the "Relationship" tab, click the "Add" button.

5. Select the primary key table

In the "Select Table" dialog box, select the table that contains the primary key column.

6. Mapping primary key and foreign key columns

In the "Map Columns" section, map the primary key columns to foreign key columns.

7. Configure foreign key constraints

In the "Constraints" section, you can configure the details of foreign key constraints, for example:

• Update rules: Specify how the data in the foreign key table is updated when the data in the primary key table is updated.
• Delete rules: Specify how the data in the foreign key table is processed when the data in the primary key table is deleted.

8. Complete

Click the OK button to apply the changes.

Tip:

• The data type of the foreign key column must be compatible with the data type of the primary key column.
• Navicat automatically creates foreign key constraints, but you can also create them manually.
• Foreign keys enforce data integrity and help prevent data inconsistencies between tables.

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