檢索來自sql server表列的描述項

Question

是否可以通過使用connection.getschema（）從sql server表列中檢索描述項，就像檢索列名，數據類型可爲空，列一樣默認值等？如果是這樣，怎麼樣？

Answer 1

上的SQL Server 2005中，你可以使用這個系統表值函數：

fn_listextendedproperty (Transact-SQL)

或嘗試查詢from from this article，像這樣：

SELECT 
    [Table Name] = OBJECT_NAME(c.object_id), 
    [Column Name] = c.name, 
    [Description] = ex.value 
FROM 
    sys.columns c 
LEFT OUTER JOIN 
    sys.extended_properties ex 
ON 
    ex.major_id = c.object_id 
    AND ex.minor_id = c.column_id 
    AND ex.name = 'MS_Description' 
WHERE 
    OBJECTPROPERTY(c.object_id, 'IsMsShipped')=0 
    -- AND OBJECT_NAME(c.object_id) = 'your_table' 
ORDER 
    BY OBJECT_NAME(c.object_id), c.column_id 

Answer 2

試試這個：

SELECT 
    [Table Name] = i_s.TABLE_NAME, 
    [Column Name] = i_s.COLUMN_NAME, 
    [Description] = s.value 
FROM 
    INFORMATION_SCHEMA.COLUMNS i_s 
LEFT OUTER JOIN 
    sys.extended_properties s 
ON 
    s.major_id = OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME) 
    AND s.minor_id = i_s.ORDINAL_POSITION 
    AND s.name = 'MS_Description' 
WHERE 
    OBJECTPROPERTY(OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME), 'IsMsShipped')=0 
    --AND i_s.TABLE_NAME = 'table_name' 
ORDER BY 
    i_s.TABLE_NAME, i_s.ORDINAL_POSITION 

編輯：固定的查詢:-)

HTH

Answer 3

如果你已經有了DataTable，就像你提到的那樣 - 查看它的數據列！

foreach(DataColumn col in dataTable.Columns) 
{ 
    // check out all the properties on the DataColumn 
} 

這是否包含你所需要的？