add foreign key constraints in sql

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hi i have two tables. when i tried to add a foreign key using this query

SQL

alter  table tbl_user_login add constraint fkcid foreign key(fk_Consumer_ID) references tbl_Consumer_details(Consumer_ID)

it shows an error:

There are no primary or candidate keys in the referenced table 'tbl_Consumer_details' that match the referencing column list in the foreign key 'fkcid'.

help me

thanks in advance

Posted 28-Nov-11 19:00pm

afsal.mp

Updated 28-Nov-11 19:14pm

Uday P.Singh

v5

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RaisKazi · Answer 1 · 2011-11-28T19:39:00

Solution 3

Have a look at below links for information on "FOREIGN KEY Constraint".

http://www.w3schools.com/sql/sql_foreignkey.asp

http://msdn.microsoft.com/en-us/library/ms175464.aspx

Posted 28-Nov-11 19:39pm

RaisKazi

Eduard Lu · Answer 2 · 2011-11-28T19:02:00

Solution 1

this means your table 2 doesn't have a primary key to be referenced by table 1.

Assign a primary key first to the secondary table you are joining

Regards,
Eduard

Posted 28-Nov-11 19:02pm

Eduard Lu

Selva K · Answer 3 · 2011-11-28T19:34:00

Solution 2

Change Consumer_ID as Primary Key in the reference table

Posted 28-Nov-11 19:34pm

Selva K