Create primary key of two column of same table

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hello.......
i have a table named as 'floattable' contains columns as follows:-

id int,
s95id varchar(10)
tagname varchar(10)
tagvalue varchar(10)

and i want to make primary key of two columns (id,s95) by combining them.plz give perfect query.

Posted 16-Feb-14 21:42pm

TAUSEEF KALDANE

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Shah Parth P · Answer 1 · 2014-02-16T21:47:00

Solution 1

CREATE TABLE flotable
(
id int,
s95id varchar(10),
tagname varchar(10),
tagvalue varchar(10),
PRIMARY KEY(id,s95id)
)

Posted 16-Feb-14 21:47pm

Shah Parth P

Comments

TAUSEEF KALDANE 17-Feb-14 4:01am

and how do i refer this key in another table?
how do i create foreign key by referring this primary key?

Ankur^\m/ · Answer 2 · 2014-02-16T21:48:00

Solution 2

SQL

ALTER TABLE floattable
   ADD CONSTRAINT PK_FloatTableID PRIMARY KEY (id, s95id)

Posted 16-Feb-14 21:48pm

Ankur^\m/

Aravindba · Answer 3 · 2014-02-16T21:51:00

Hi You can have a Composite Primary Key which is a primary key made from two or more columns. For example:

CREATE TABLE userdata (
id integer,
s95id varchar(200),,
tagname varchar(200),
tagvalue varchar(200),
primary key (id , s95id )
);

if above not work try to use both data type as integer.

try this link

http://stackoverflow.com/questions/217945/can-i-have-multiple-primary-keys-in-a-single-table[^]

http://www.tutorialspoint.com/sql/sql-primary-key.htm[^]

[^]

Regards
Aravind

King Fisher · Answer 4 · 2014-02-16T23:28:00

Solution 5

SQL

CREATE TABLE flotable
(
id int not null,
s95id int not null,
tagname varchar(10),
tagvalue varchar(10),

PRIMARY KEY (id,s95id),
CONSTRAINT fk_PerOrders FOREIGN KEY (id)
REFERENCES DimAccount(accountkey)
)

Posted 16-Feb-14 23:28pm

King Fisher

Shah Parth P · Answer 5 · 2014-02-16T23:19:00

Solution 4

you can to individually refer the keys for foreign key in other table.
by 'references' clause

Posted 16-Feb-14 23:19pm