sql - 查找对某个表的所有外键引用

Question

我有一张表，我想找到所有其他外键的表。我认为这个线程有答案：如何列出引用 SQL Server 中给定表的所有外键？

但是在尝试了这些事情之后，它实际上并没有列出所有的表。

Answer 1

在这里，您有另一个代码片段，在WHERE子句的末尾，用您的表名替换。

SELECT
    K_Table = FK.TABLE_NAME,
    FK_Column = CU.COLUMN_NAME,
    PK_Table = PK.TABLE_NAME,
    PK_Column = PT.COLUMN_NAME,
    Constraint_Name = C.CONSTRAINT_NAME
FROM
    INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS C
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS FK
    ON C.CONSTRAINT_NAME = FK.CONSTRAINT_NAME
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS PK
    ON C.UNIQUE_CONSTRAINT_NAME = PK.CONSTRAINT_NAME
INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CU
    ON C.CONSTRAINT_NAME = CU.CONSTRAINT_NAME
INNER JOIN (
            SELECT
                i1.TABLE_NAME,
                i2.COLUMN_NAME
            FROM
                INFORMATION_SCHEMA.TABLE_CONSTRAINTS i1
            INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE i2
                ON i1.CONSTRAINT_NAME = i2.CONSTRAINT_NAME
            WHERE
                i1.CONSTRAINT_TYPE = 'PRIMARY KEY'
           ) PT
    ON PT.TABLE_NAME = PK.TABLE_NAME
 WHERE PK.TABLE_NAME = 'your_table_name'

Answer 2

尝试这样的事情：

;WITH ReferencingFK AS 
(
    SELECT 
        fk.Name AS 'FKName',
        OBJECT_NAME(fk.parent_object_id) 'ParentTable',
        cpa.name 'ParentColumnName',
        OBJECT_NAME(fk.referenced_object_id) 'ReferencedTable',
        cref.name 'ReferencedColumnName'
    FROM 
        sys.foreign_keys fk
    INNER JOIN 
        sys.foreign_key_columns fkc ON fkc.constraint_object_id = fk.object_id
    INNER JOIN 
        sys.columns cpa ON fkc.parent_object_id = cpa.object_id AND fkc.parent_column_id = cpa.column_id
    INNER JOIN 
        sys.columns cref ON fkc.referenced_object_id = cref.object_id AND fkc.referenced_column_id = cref.column_id
)
SELECT 
    FKName,
    ParentTable,
    ParentColumnName,
    ReferencedTable,
    ReferencedColumnName
FROM 
    ReferencingFK
WHERE
    ReferencedTable = '**YourTableNameHere**'
ORDER BY 
    ParentTable, ReferencedTable, FKName