不能返回模式表包括PKS和FK

Question

需要填充DataSet與數據庫中的所有表和每個數據表中必須有下列列

• 表名
• 的ColumnName
• ISNULLABLE，
• DataType
• MaxLength
• IsprimaryKey
• IsForeignKey

我做了以下但不這樣做給我嘗試添加一個關節primarykeys和foreignkeys

SELECT * 
FROM INFORMATION_SCHEMA.COLUMNS C  
WHERE C.TABLE_SCHEMA='dbo' 
ORDER BY C.TABLE_NAME 

，但我得到錯誤的結果

SELECT C.TABLE_SCHEMA, 
    C.TABLE_NAME, 
    C.COLUMN_NAME, 
    C.IS_NULLABLE, 
    C.DATA_TYPE, 
    C.CHARACTER_MAXIMUM_LENGTH, 
    TC.CONSTRAINT_TYPE 
FROM INFORMATION_SCHEMA.COLUMNS C 
    INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC 
     ON c.TABLE_NAME=TC.TABLE_NAME 
WHERE C.TABLE_SCHEMA='dbo' 
ORDER BY C.TABLE_NAME 

我如何返回上面關於表的所有信息，包括if是否是外鍵的主鍵？

非常感謝

Answer 1

如果我給你正確的，那麼：

1.You需要做LEFT join INFORMATION_SCHEMA.TABLE_CONSTRAINTS

2.Put的case

嘗試下面的查詢，讓我知道，如果我對不對？

SELECT 
Distinct 
C.TABLE_SCHEMA, 
C.TABLE_NAME, 
C.COLUMN_NAME, 
C.IS_NULLABLE, 
C.DATA_TYPE, 
C.CHARACTER_MAXIMUM_LENGTH, 
CASE WHEN TC.CONSTRAINT_TYPE='PRIMARY KEY' THEN 'Yes' Else 'No' end as ISprimaryKey, 
CASE WHEN TC.CONSTRAINT_TYPE='FOREIGN KEY' THEN 'Yes' Else 'No' end as IsForeignKey 
FROM INFORMATION_SCHEMA.COLUMNS C with(nolock) 
LEFT join INFORMATION_SCHEMA.TABLE_CONSTRAINTS TC with(nolock) on c.TABLE_NAME=TC.TABLE_NAME 
WHERE C.TABLE_SCHEMA='dbo' 
ORDER BY C.TABLE_NAME