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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....
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What is the difference between http1.0 and http1.1 version?
salam http 1.0 establishes a TCP connection for each packet http 1.1 uses only one connection for all packets
What is difference between WEP 64 and WEP 128?
The 64 bit WEP key uses a 40 bit (10 Hex character) Encryption and a128 bit WEP key uses a 104 bit (26 Hex Character) Encryption.So the 128 bit WEP key is a higher level of encryption compared to 64 bit WEP.
What is the tap key on a computer key board?
I couldn't find the tap key on my keyboard. However , I do find the Tab key. Tab Key lets you to add gap between two words, jumps from one control to other and to change the selection.
What is difference between natural key and surrogate key?
Surrogate Key: Surrogate keys are keys that have no "business" meaning and are solely used to identify a record in the table. Such keys are either database generated (example: Identity in SQL Server, Sequence in Oracle, Sequence/Identity in DB2 UDB etc.) or system generated values (like generated via a table in the schema). Natural Key: Keys are natural if the attribute it represents is used for identification independently of the database schema. What this basically means is that the keys are natural if people use them example: Invoice-Numbers, Tax-Ids, SSN etc.
Using foreign key on ER diagram?
Foreign keys isnt drawn at a ER-diagram. The relation drawn between entities is enough to show, that der is at foreign key
What is the key difference between a protosun and a sun?
what is the key difference between a protosun and the real sun?
What is the difference between a key and a legend?
There is no difference.
What is the key difference between a liquid a gas?
intermolecular attractions
What is a key difference between a liquid and a gas?
intermolecular attractions
What is the key difference between a gas and liquid?
intermolecular attractions
What is the key difference between a liquid and a gas answer?
A is expanded in a container.
What is the difference between a key deer and a deer?
key deer are smaller than regular deer
What is the difference between a dichotomous key and a taxonomic key?
A dichotomous key helps you figure out what your thing is, a taxonimic key helps you figure out the properties.
What is the difference between formating with the format painter and with the F4 key?
gfgfgfg
Difference between the delete key an the back space?
The backspace key deletes to the left of the cursor, and the delete key deletes to the right of the cursor.
What is the difference between a Primary Key and a Secondary Key?
A Primary Key is a unique identifier for each record in a database table and is used to enforce entity integrity. A Secondary Key is a non-unique index that is used for querying and organizing data efficiently but does not have the constraint of uniqueness.
Whats the difference between a valet key and regular key on a 1992 Honda Prelude?
Normally the difference between a Valet and Master key is the Valet key will not work in the glove box or trunk of the vehicle. The actual differences in the keys are either the grooves in the key or the thickness of the key which restrict it from going into the locks. Occasionally the valet key may not have certain cuts on it to work those locks.
