How to deal with the requirement of non-empty table creation in phpmyadmin

Create non-null fields in PHPMyAdmin: Check the "NOT NULL" checkbox when creating the table. When inserting data, non-null fields do not allow null values ​​to be inserted. A non-null field can be changed to nullable by unchecking the "NOT NULL" checkbox. An empty string can be inserted by entering two single quotes.

PHPMyAdmin Processing of non-null fields in table creation

When creating a table in PHPMyAdmin, if you need to If a field is set to non-null, that is, null values ​​are not allowed to be inserted, you can follow the steps below:

1. Open PHPMyAdmin: Access the PHPMyAdmin page of the MySQL database.
2. Create a new table: Click the "Database" tab in the left menu, select the database where you want to create the table, and then click the "New" tab.
3. Enter table name and column name: In the "New Table" page, enter the name of the table and the name of the non-empty field to be created.
4. Set data type: Select the data type to be stored in this field from the Type drop-down menu.
5. Check the "NOT NULL" checkbox: In the field options, check the "NOT NULL" checkbox to make it a non-null field.
6. Save Table: Click the "Save" button at the bottom of the page to create the table.

Afterwards, when inserting data into this table, non-null fields will not allow null values ​​to be inserted. If you try to insert a null value, PHPMyAdmin will prompt an error message.

Other notes:

• If you need to change a non-null field to nullable later, you can uncheck it in the "Structure" tab Select the "NOT NULL" checkbox.
• If you need to insert an empty string instead of a null value, you can enter two single quotes ('') in the field value.

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