+ 4
What is primary key in simple words
9 Réponses
+ 4
You've many attributes of yours in Facebook like name, username, email, phone number, password, website, about, etc.
But you can only login with-
Either phone number or email
and
password
because these three are the primary keys to access rest of your database information.
+ 5
primary key is the unique value that identify a record
+ 3
primary is a unique value to identify something
par example table
Id Name Lastname
1 ccc ccc
2 ccc ccc
person can have same name or last name so you cant identify , while every person have different Id unique
+ 3
a unique identifier
+ 2
simple it is unique, And in my experience it almost come number,or auto number.
+ 2
they function just as an id u need a person's number to call and not the name
+ 1
It is a column used to join tables and garuntee the uniqueness of a row
+ 1
It's the unique key value that is assigned to that table
+ 1
primary key is assigned to the column which cannot have duplicate values and null values
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