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∙ 13y ago
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What is the difference between Primarey key and Forn Key?
establishing a relation between two tables called fornkey.......the colum name should be unique is called "primary key"...a table contain only one primary key...a table contain more then one fornkey....
Entity integrity constraint?
The entity integrity constraint states that no primary key value can be null. This is because the primary key value is used to identify individual tuples in a relation. Having null value for the primary key implies that we cannot identify some tuples. This also specifies that there may not be any duplicate entries in primary key column key row.
Is it possible for the computer to generate values that are used as the primary key column?
Yes. Often times, an automatically generated key column will be a normal primary key using the auto_increment attribute.
Which constraint type enforces uniqueness?
Primary key
When is the concept of weak entity used in data modelling?
A weak entity can be identified uniquely only by considering the primary key of another (owner) entity.
You can only delete a primary key in what veiw?
Design view
Which field MS Access will not allow you to delete?
A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.A primary key field.
What is used to view only those records that meet the specified criteria in access?
primary key
Which field does MS Access not allow you to delete?
The Primary key field(s).
How is a concatenated primary key created?
In the table design view of SQL Server, select all the columns that make up the primary key and then select "Set as Primary Key".
Can super key be as primary key?
I think super key is treated as the primary key because in a table their will be only one primary key.
How do you delete songs you have multiples of in iTunes?
# Open iTunes # View -> Show Duplicates # Delete one of each duplicate copy (ie. do not delete every song there - only delete the relevant amount so that you are left with one of each song). To delete a song, click on it and press the backspace key, or right click and choose "Delete"
What is the difference between pressing the Delete key or the left arrow key in the middle of a line of text?
Delete key deletes any amount of text. The left arrow key only moves the I beam
How do you delete text mess-gs on a Motorola V3 with no delete button in the message center?
You must select options which is the right soft key and then select delete. If u do this inside a message it will only delete the single message. If u do this while looking at list view (which shows inbox, sent, drafts), you will have the option to delete all messages or all in a single folder.
How do you get rid of an array in Excel?
Select the entire array and press the Delete key. There are usually only problems if you want to delete some, but not all of the cells in the array.
How do you delete a table?
Burn It!!!!!!!!!!!!!!![[User:69.74.224.11|69.74.224.11]] T-T
How do you delete a field in Design view?
Whether you are designing a table or a query, select the field by clicking beside it in a table or above it in a query, so that it is highlighted. Then press the delete key.
