sql-server - SQL CE Compact 3.5 表的标识列

Question

是否可以针对 INFORMATION_SCHEMA 或针对系统表编写查询以确定列是否是 SQL CE 版本 3.5 中的标识列？

Answer 1

使用COLUMNPROPERTY。供你参考

a) 列属性 (Transact-SQL)

b) 身份列

Answer 2

尝试以下查询：

;WITH PK_INFO AS (SELECT CON.TABLE_CATALOG, CON.TABLE_SCHEMA, CON.CONSTRAINT_NAME, USO.COLUMN_NAME 
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS CON
    JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE USO ON CON.CONSTRAINT_NAME = USO.CONSTRAINT_NAME
        AND CON.TABLE_CATALOG = USO.TABLE_CATALOG AND CON.TABLE_SCHEMA = USO.TABLE_SCHEMA
WHERE CON.TABLE_NAME = 'YOUR_TABLE'
    AND CON.CONSTRAINT_TYPE = 'PRIMARY KEY'
    ) SELECT DISTINCT CASE WHEN (PK.COLUMN_NAME IS NULL) THEN 0 ELSE 1 END AS COLUMN_IS_PRIMARYKEY, * 
FROM INFORMATION_SCHEMA.COLUMNS COL 
LEFT JOIN PK_INFO PK on COL.COLUMN_NAME = PK.COLUMN_NAME WHERE COL.TABLE_NAME = 'YOUR_TABLE' ORDER BY COL.ORDINAL_POSITION ASC