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•  示例

SELECT     b.name AS TableName, a.name AS FieldName, ISNULL(a.is_nullable, 1) AS AllowNull, d.definition AS DefaultValue, CASE WHEN c.Name = 'image' THEN 'System.Byte[]' WHEN c.Name IN ('image', 
                      'uniqueidentifier', 'ntext', 'varchar', 'ntext', 'nchar', 'nvarchar', 'text', 'char') THEN 'System.String' WHEN c.Name IN ('tinyint', 'smallint', 'int', 'bigint') 
                      THEN 'System.Int32' WHEN c.Name IN ('datetime', 'smalldatetime', 'date') THEN 'System.DateTime' WHEN c.Name IN ('float', 'decimal', 'numeric', 'money', 'real', 'smallmoney') 
                      THEN 'System.Decimal' WHEN c.Name = 'bit' THEN 'System.Boolean' ELSE c.Name END AS ValueType, CASE WHEN ColumnProperty(a.object_id, a.Name, 'Precision') 
                      = - 1 THEN '2^31-1' ELSE rtrim(ColumnProperty(a.object_id, a.Name, 'Precision')) END AS MaxLength, CASE WHEN a.[max_length] = - 1 AND 
                      c.Name != 'xml' THEN 'max/2G' WHEN c.Name = 'xml' THEN '2^31-1字节/2G' ELSE rtrim(a.[max_length]) END AS MaxByteCount, CASE WHEN CHARINDEX('，', CAST(e.value AS nvarchar(100))) 
                      > 0 THEN substring(CAST(e.value AS nvarchar(100)), 1, CHARINDEX('，', CAST(e.value AS nvarchar(100))) - 1) ELSE CAST(e.value AS nvarchar(100)) END AS FieldDesc, CASE WHEN CHARINDEX('，', 
                      CAST(f.value AS nvarchar(100))) > 0 THEN substring(CAST(f.value AS nvarchar(100)), 1, CHARINDEX('，', CAST(f.value AS nvarchar(100))) - 1) ELSE CAST(f.value AS nvarchar(100)) END AS TableDesc, 
                      CASE WHEN c.Name = 'image' THEN '图片' WHEN c.Name IN ('image', 'uniqueidentifier', 'ntext', 'varchar', 'ntext', 'nchar', 'nvarchar', 'text', 'char') THEN '字符串' WHEN c.Name IN ('tinyint', 
                      'smallint', 'int', 'bigint') THEN '数字' WHEN c.Name IN ('datetime', 'smalldatetime', 'date') THEN '时间' WHEN c.Name IN ('float', 'decimal', 'numeric', 'money', 'real', 'smallmoney') 
                      THEN '金额' WHEN c.Name = 'bit' THEN '布尔' ELSE c.Name END AS ValueTypeDesc
FROM         sys.columns AS a INNER JOIN
                      sys.objects AS b ON a.object_id = b.object_id LEFT OUTER JOIN
                      sys.types AS c ON a.user_type_id = c.user_type_id LEFT OUTER JOIN
                      sys.default_constraints AS d ON a.default_object_id = d.object_id LEFT OUTER JOIN
                      sys.extended_properties AS e ON e.name = 'MS_Description' AND e.major_id = a.object_id AND e.minor_id = a.column_id LEFT OUTER JOIN
                      sys.extended_properties AS f ON e.name = 'MS_Description' AND f.major_id = a.object_id AND f.minor_id = 1
WHERE     (b.type IN ('U', 'V')) AND (a.name <> 'WBDBH')

 整理版

SELECT     b.name AS TableName, a.name AS FieldName, 
    ISNULL(a.is_nullable, 1) AS AllowNull, d.definition AS DefaultValue, 
    CASE WHEN c.Name = 'image' THEN 'System.Byte[]' 
    WHEN c.Name IN ('image','uniqueidentifier', 'ntext', 'varchar', 'ntext', 'nchar', 'nvarchar', 'text', 'char') 
        THEN 'System.String' 
    WHEN c.Name IN ('tinyint', 'smallint', 'int', 'bigint') 
        THEN 'System.Int32' 
    WHEN c.Name IN ('datetime', 'smalldatetime', 'date') THEN 'System.DateTime' 
    WHEN c.Name IN ('float', 'decimal', 'numeric', 'money', 'real', 'smallmoney') 
        THEN 'System.Decimal' 
    WHEN c.Name = 'bit' THEN 'System.Boolean' ELSE c.Name END AS ValueType, 
    CASE WHEN ColumnProperty(a.object_id, a.Name, 'Precision') 
                      = - 1 THEN '2^31-1' ELSE rtrim(ColumnProperty(a.object_id, a.Name, 'Precision')) END AS MaxLength, CASE WHEN a.[max_length] = - 1 AND 
                      c.Name != 'xml' THEN 'max/2G' WHEN c.Name = 'xml' THEN '2^31-1字节/2G' ELSE rtrim(a.[max_length]) END AS MaxByteCount, CASE WHEN CHARINDEX('，', CAST(e.value AS nvarchar(100))) 
                      > 0 THEN substring(CAST(e.value AS nvarchar(100)), 1, CHARINDEX('，', CAST(e.value AS nvarchar(100))) - 1) ELSE CAST(e.value AS nvarchar(100)) END AS FieldDesc, CASE WHEN CHARINDEX('，', 
                      CAST(f.value AS nvarchar(100))) > 0 THEN substring(CAST(f.value AS nvarchar(100)), 1, CHARINDEX('，', CAST(f.value AS nvarchar(100))) - 1) ELSE CAST(f.value AS nvarchar(100)) END AS TableDesc, 
                      CASE WHEN c.Name = 'image' THEN '图片' WHEN c.Name IN ('image', 'uniqueidentifier', 'ntext', 'varchar', 'ntext', 'nchar', 'nvarchar', 'text', 'char') THEN '字符串' WHEN c.Name IN ('tinyint', 
                      'smallint', 'int', 'bigint') THEN '数字' WHEN c.Name IN ('datetime', 'smalldatetime', 'date') THEN '时间' WHEN c.Name IN ('float', 'decimal', 'numeric', 'money', 'real', 'smallmoney') 
                      THEN '金额' WHEN c.Name = 'bit' THEN '布尔' ELSE c.Name END AS ValueTypeDesc
FROM         sys.columns AS a INNER JOIN
                      sys.objects AS b ON a.object_id = b.object_id 
                      LEFT OUTER JOIN sys.types AS c ON a.user_type_id = c.user_type_id 
                      LEFT OUTER JOIN sys.default_constraints AS d ON a.default_object_id = d.object_id 
                      LEFT OUTER JOIN sys.extended_properties AS e ON e.name = 'MS_Description' AND e.major_id = a.object_id AND e.minor_id = a.column_id 
                      LEFT OUTER JOIN sys.extended_properties AS f ON e.name = 'MS_Description' AND f.major_id = a.object_id AND f.minor_id = 1
WHERE     (b.type IN ('U', 'V')) 
        AND (a.name <> 'WBDBH')
        
        

select *    
FROM         sys.columns AS a 
            INNER JOIN sys.objects AS b ON a.object_id = b.object_id 
            LEFT OUTER JOIN sys.types AS c ON a.user_type_id = c.user_type_id 
            LEFT OUTER JOIN sys.default_constraints AS d ON a.default_object_id = d.object_id 
            LEFT OUTER JOIN sys.extended_properties AS e ON e.name = 'MS_Description' AND e.major_id = a.object_id AND e.minor_id = a.column_id 
            LEFT OUTER JOIN sys.extended_properties AS f ON e.name = 'MS_Description' AND f.major_id = a.object_id AND f.minor_id = 1
WHERE     (b.type IN ('U', 'V')) 
        AND (a.name <> 'WBDBH')
        
    
select * From  sys.columns where object_id = '17'
select * From sys.objects where object_id = '17'
    

a:sys.columns

user_type_id
object_id
default_object_id
column_id

b:sys.objects

　　object_id

　　

c:sys.types

　　

sys.default_constraints