what is primary key,unique key, foreign key? can u teach me in simple language?

what is primary key,unique key, foreign key? can u teach me
in simple language?

Question Posted / charankum

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what is primary key,unique key, foreign key? can u teach me in simple language?..

Answer / pounammal sambath

primary key:
* primary key is the key which is used to for unique identification of the row in the table.
*it does not allows the duplicate and null values.

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what is primary key,unique key, foreign key? can u teach me in simple language?..

Answer / patel gopikumar

PRIMARY KEY : it is a key that not allow null value in database tables field....

UNIQUE KEY : it is a key that store or manage data uniquely...

FOREIGN KEY : it is key that use is...connect two fields in the different tables........with foreign key......

thnks........

s-150907-007 PATEL GOPIKUMAR

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what is primary key,unique key, foreign key? can u teach me in simple language?..

Answer / sri lekha

a key to open primary school is primary key
a key for foreign schools is foreign key
answering this way is unique

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16 Yes

44 No

what is primary key,unique key, foreign key? can u teach me in simple language?..

Answer / manmohan singh

The key to Prime Ministers office in delhi is known as
primary key. The key to Foreign Secy's cabin is foreign key.

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114 Yes

263 No

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