How to set foreign keys in navicat premium

The steps to set up foreign keys in Navicat Premium are as follows: enable foreign key constraints; select the main table, main field, slave table and slave field; set update and delete rules and cascading options; save changes and restart Navicat Premium.

How to set up foreign keys in Navicat Premium

Step 1: Enable foreign key constraints

• Open Navicat Premium and connect to your database.
• Right-click the table on which you want to create a foreign key constraint and select Edit > Relationships.
• In the Relationship dialog box, enable the Enable foreign key constraints checkbox.

Step 2: Create a foreign key

• In the Main Table drop-down list, select the main table that contains the foreign key column.
• In the "Main Field" drop-down list, select the column in the master table, which will reference the column in the slave table.
• In the "Slave table" drop-down list, select the slave table that references the main table column.
• In the "From field" drop-down list, select the column from the table that will be referenced.

Step 3: Set foreign key options

• Update rules:Definition When a record in the main table is updated, How to update the corresponding record from the table.
• Delete rules: Define how to delete the corresponding records in the slave table when a record in the main table is deleted.
• Cascading update/deletion: Automatically cascade updates or deletes records from the table.

Step 4: Save changes

• Click the OK button to save the changes.
• Restart Navicat Premium to activate foreign key constraints.

Additional Tips

• Make sure the columns in the main table have unique constraints or primary key constraints.
• The data type of the columns in the slave table should be the same as the columns in the master table.
• Foreign key constraints ensure data integrity and consistency.

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