通过SP查看指定表格的DDL信息

   以下SP可根据SQL表格名称来查询表中所有字段的名称,类型,精度,小数位数,是否允许为Null值,是否主键,是否计算列,参与的Index名称, 索引中排序类型等. 还可以查看字段的说明,   

   已通过本人测试验证. 2013-03-10 

-- Exec spRD_GetTableDDL 'tbasCustomer'

Create Proc spRD_GetTableDDL
  @ASqlTableName VarChar(500)
as
begin  
SELECT 
   TableName=CASE WHEN C.column_id=1 THEN O.name ELSE N'' END,
   TableDesc=ISNULL(CASE WHEN C.column_id=1 THEN PTB.[value] END,N''),
   Column_id=C.column_id,
   ColumnName=C.name,
   PrimaryKey=ISNULL(IDX.PrimaryKey,N''),
   [IDENTITY]=CASE WHEN C.is_identity=1 THEN N'√'ELSE N'' END,
   Computed=CASE WHEN C.is_computed=1 THEN N'√'ELSE N'' END,
   Type=T.name,
   Length=C.max_length,
   Precision=C.precision,
   Scale=C.scale,
   NullAble=CASE WHEN C.is_nullable=1 THEN N'√'ELSE N'' END,
   [Default]=ISNULL(D.definition,N''),
   ColumnDesc=ISNULL(PFD.[value],N''),
   IndexName=ISNULL(IDX.IndexName,N''),
   IndexSort=ISNULL(IDX.Sort,N''),
   Create_Date=O.Create_Date,
   Modify_Date=O.Modify_date
FROM sys.columns C
   INNER JOIN sys.objects O
       ON C.[object_id]=O.[object_id] AND O.type='U' AND O.is_ms_shipped=0
   INNER JOIN sys.types T
       ON C.user_type_id=T.user_type_id
   LEFT JOIN sys.default_constraints D
       ON C.[object_id]=D.parent_object_id  AND C.column_id=D.parent_column_id  AND C.default_object_id=D.[object_id]
   LEFT JOIN sys.extended_properties PFD
       ON PFD.class=1 AND C.[object_id]=PFD.major_id AND C.column_id=PFD.minor_id
          -- AND PFD.name='Caption' -- 字段说明对应的描述名称(一个字段可以添加多个不同name的描述)
   LEFT JOIN sys.extended_properties PTB
       ON PTB.class=1  AND PTB.minor_id=0  AND C.[object_id]=PTB.major_id
            -- AND PFD.name='Caption' -- 表说明对应的描述名称(一个表可以添加多个不同name的描述)
   LEFT JOIN -- 索引及主键信息
     (
        SELECT 
            IDXC.[object_id],
            IDXC.column_id,
            Sort=CASE INDEXKEY_PROPERTY(IDXC.[object_id],IDXC.index_id,IDXC.index_column_id,'IsDescending')
            WHEN 1 THEN 'DESC' WHEN 0 THEN 'ASC' ELSE '' END,
            PrimaryKey=CASE WHEN IDX.is_primary_key=1 THEN N'√'ELSE N'' END,
            IndexName=IDX.Name
        FROM sys.indexes IDX
            INNER JOIN sys.index_columns IDXC
               ON IDX.[object_id]=IDXC.[object_id] AND IDX.index_id=IDXC.index_id 
            LEFT JOIN sys.key_constraints KC
              ON IDX.[object_id]=KC.[parent_object_id] AND IDX.index_id=KC.unique_index_id
            INNER JOIN -- 对于一个列包含多个索引的情况,只显示第1个索引信息
             (
                 SELECT [object_id], Column_id, index_id=MIN(index_id)
                    FROM sys.index_columns
                 GROUP BY [object_id], Column_id
     ) IDXCUQ
        ON IDXC.[object_id]=IDXCUQ.[object_id]  AND IDXC.Column_id=IDXCUQ.Column_id AND IDXC.index_id=IDXCUQ.index_id
   ) IDX
   ON C.[object_id]=IDX.[object_id]  AND C.column_id=IDX.column_id
   WHERE O.name=@ASqlTableName  -- 如果只查询指定表,加上此条件
   ORDER BY O.name,C.column_id
end ;