新的sql表中不需要的主键

Question

I have bulid a new table in my SQL database with the following command :

Create Table if not exists Images (ImageID int (10) primary key NOT NULL AUTO_INCREMENT , 
         UserID int (10) NOT NULL,
                 Translated tinyint Default 0,
                 DeleteImage tinyint Default 0,
                 DataPosted date,
                 TheImage blob,
                 Translation text,
                 FOREIGN KEY (UserID) REFERENCES Users(UserID) ON DELETE CASCADE)

the table is been created just fine, but what i'm checking what was build i've found out that in the table the columns ImageID, TheImage, and Translation are defined as primary keys. as the query is showing I want only the ImageId to be the primary key.

what's happening here? tnx

Answer 1

Seems quite unlikely. It seems far more likely that something is wrong with whatever tool you're using to find out which columns are primary keys.

Actually, from the documentation - here: http://dev.mysql.com/doc/refman/5.1/en/create-table.html - it would follow that a MySQL table can only have one primary key. But even if not, why would you worry about it?