IS IT POSSIBLE THAT THERE R TWO PRIMARY KEY WILL BE IN A
SAME TABLE?PLZ HELP ME BY GIVING THE ANSWER.THANK U.
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Answer / ram
Absolutly No. One table can not have more than one PK. But
u can have 2 cols as 1 PK called Composite Primary Key.
| Is This Answer Correct ? | 40 Yes | 0 No |
Answer / ram
Primary key
============
1. A table should have only one primary key
2. More than one column can consist of a primary key – upto
64 columns
3. Can not be NULL values (missing values)
4. Should be unique values (no duplicate value)
Foreign key
============
1. A table may have zero or more than that upto 32 keys
2. More than one column can consist a primary key – upto 64
columns
3. Can have NULL values
4. Can have duplicate values
5. There should be a corresponding primary key in the
parent table to enforce referential integrity for a foreign
key
| Is This Answer Correct ? | 16 Yes | 1 No |
Answer / maran
No No.. it shouldnt.. One table should have only one PK.
| Is This Answer Correct ? | 8 Yes | 1 No |
Answer / tdguy
There can be more than one primary key in TD. But PI should
always be one and can contain upto 16 columns. Performance
of Teradata is directly linked to PI. Row hash value (32
bit) is calculated from PI using the hashing function. This
hash value along with the uniqueness id (32 bit value)
helps in locating the amp.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / tdguy
Hi,
Correction to the answer mentioned above. Only one PK can
be defined for a table-not null,not duplicate. But there
can be 32 secondary indexes. Thanks Santhosh.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / lizy
please can you tell me Name at least three brands of
Database Management Systems. need it urgently thank you
very much
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / rajiv senapati
go through rdbms book by rajiv senapati and rajib mall
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / santosh kumar sarangi
Hi Tdguy, can you please tell me the syntax to create more
than one primary key for a single table.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / lizy
Is it possible to have more than one row on the same table
with the same foreign key. please help me by giveng this
answer thks
| Is This Answer Correct ? | 1 Yes | 2 No |
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