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I can't find where I can set a field as NOT NULL in phpmyadmin. I would like to have alse my database controlling this feature. I am doing this programatically but I believe that this could add an extra layer of security in my system.
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To enforce NOT NULL for a column in MySQL, you use the ALTER TABLE .... MODIFY command and restate the column definition, adding the NOT NULL attribute.
You can add a not null column at the time of table creation or you can use it for an existing table. In the above table, we have declared Id as int type that does not take NULL value. If you insert NULL value, you will get an error. Here is the query to add a not null column in an existing table using alter command.
PHPMYADMIN Null Column Default ValueWhen an entry is added to a database, you could insert 'NULL' by default if wish to do so. One such example could be that you have a form and the user can insert their email address or leave it blank. If it is left blank, the default 'NULL' value can be inserted instead.
When editing the field in the Structure tab, look for the "NULL" checkbox. When un-checked, this is the equivalent of the NOT NULL statement.
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