Add and set the primary key to the built phpMyAdmin table:
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In the database corresponding to phpMyAdmin Find the table where you want to add the primary key. Then click on the corresponding "Structure" behind the table, as shown in the following figure:
After opening the phpMyAdmin database table structure, we can see the primary key corresponding to the database table. We Click on the primary key to add and set the primary key to the phpMyAdmin table, as shown in the figure below.
phpMyAdmin prompts that setting the table primary key is successful. At this time, you can see that the key at the primary key changes color, as shown in the figure below.
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