如何查詢表格的列描述？

Question

是否有任何查詢來獲取具有主鍵外鍵引用的列列表？

SELECT column_name, data_type, CHARacter_maximum_length 
FROM DBTIME.information_schema.columns 
WHERE table_name = 'Table Name' 

從這個查詢我得到的數據類型和列的最大長度。除此之外，我需要知道它的外鍵主鍵引用。請幫助...

Answer 1

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 

Answer 2

SELECT * FROM information_schema.columns WHERE table_name = 'Table Name' 
select * from INFORMATION_SCHEMA.TABLE_CONSTRAINTS where TABLE_NAME='Table Name'// It will list all the primary key and foreign key references.