Determine SQL Server foreign key name - sql-server

Question

I'm trying to determine the name of the foreign key on a table but I'm getting wrong values. If I use this example SQL
CREATE TABLE Address
(
id INT NOT NULL PRIMARY KEY,
street VARCHAR NOT NULL
);
CREATE TABLE Person
(
id INT NOT NULL PRIMARY KEY,
orgId INT NOT NULL REFERENCES dbo.Organization (id)
);
SELECT tbl.name TableName, col.name ColumnName, fk.name ForeignKey
FROM sys.tables tbl
JOIN sys.columns col ON tbl.object_id = col.object_id
LEFT OUTER JOIN sys.foreign_keys fk ON tbl.object_id = fk.parent_object_id
WHERE tbl.name = 'Person'
it's telling me the ForeignKey name is the same thing for both the id and the orgId columns of the Person table. Clearly I'm missing an extra join condition, but I can't for the life of me figure out what it is.

Answer 1

your query is missing some part,to see which columns have FK you can use sys.foreign_key_columns view.
here is what you need:
SELECT
tbl.name TableName
, col.name ColumnName
, fk2.name ForeignKey
FROM
sys.tables tbl
JOIN sys.columns col
ON tbl.object_id = col.object_id
LEFT OUTER JOIN sys.foreign_key_columns AS fk
ON col.object_id = fk.parent_object_id
AND fk.parent_column_id = col.column_id
LEFT OUTER JOIN sys.foreign_keys AS fk2
ON fk2.object_id = fk.constraint_object_id
WHERE
tbl.name = 'Person';