SQL Server數據字典的HTML格式
作者：佚名
以下的文章主要是淺談SQL Server數據字典的HTML格式，以及對其生成數據字典的示例T-SQL腳本的實際操作步驟的描述。
以下的文章主要是介紹SQL Server數據字典的HTML格式，SQL Server數據字典的HTML格在實際中的應用比例還是占為多數的，如果你對這一技術，心存好奇的話，以下的文章將會揭開它的神秘面紗。
運行下面的腳本來生成數據字典，并保存結果到一個擴展名為“.htm”的文件中。
生成數據字典的示例T-SQL腳本
- Set nocount on
- DECLARE @TableName nvarchar(35)
- DECLARE Tbls CURSOR
- FOR
- Select distinct Table_name
- FROM INFORMATION_SCHEMA.COLUMNS
- --put any exclusions here
- --where table_name not like '%old'
- order by Table_name
- OPEN Tbls
- PRINT '<HTML><body>'
- FETCH NEXT FROM Tbls
- INTO @TableName
- WHILE @@FETCH_STATUS = 0
- BEGIN
- PRINT '</br>'
- PRINT '<table border="1">'
- Print '<B>' + @TableName + '</B>'
- PRINT '</br>'
- --Get the Description of the table
- --Characters 1-250
- Select substring(cast(Value as varchar(1000)),1,250) FROM
- sys.extended_properties A
- WHERE A.major_id = OBJECT_ID(@TableName)
- and name = 'MS_Description' and minor_id = 0
- --Characters 251-500
- Select substring(cast(Value as varchar(1000)),251, 250) FROM
- sys.extended_properties A
- WHERE A.major_id = OBJECT_ID(@TableName)
- and name = 'MS_Description' and minor_id = 0
- PRINT '<tr><b>'
- --Set up the Column Headers for the Table
- PRINT '<td><b>Column Name</b></td>'
- PRINT '<td><b>Description</b></td>'
- PRINT '<td><b>InPrimaryKey</b></td>'
- PRINT '<td><b>IsForeignKey</b></td>'
- PRINT '<td><b>DataType</b></td>'
- PRINT '<td><b>Length</b></td>'
- PRINT '<td><b>Numeric Precision</b></td>'
- PRINT '<td><b>Numeric Scale</b></td>'
- PRINT '<td><b>Nullable</b></td>'
- PRINT '<td><b>Computed</b></td>'
- PRINT '<td><b>Identity</b></td>'
- PRINT '<td><b>Default Value</b></td>'
- --Get the Table Data
- SELECT '</b></tr>',
- '<tr>',
- '<td>' + CAST(clmns.name AS VARCHAR(35)) + '</td>',
- '<td>' + substring(ISNULL(CAST(exprop.value AS VARCHAR(255)),''),1,250),
- substring(ISNULL(CAST(exprop.value AS VARCHAR(500)),''),251,250) + '</td>',
- '<td>' + CAST(ISNULL(idxcol.index_column_id, 0)AS VARCHAR(20)) + '</td>',
- '<td>' + CAST(ISNULL(
- (SELECT TOP 1 1
- FROM sys.foreign_key_columns AS fkclmn
- WHERE fkclmn.parent_column_id = clmns.column_id
- AND fkclmn.parent_object_id = clmns.object_id
- ), 0) AS VARCHAR(20)) + '</td>',
- '<td>' + CAST(udt.name AS CHAR(15)) + '</td>' ,
- '<td>' + CAST(CAST(CASE WHEN typ.name IN (N'nchar', N'nvarchar') AND clmns.max_length <> -1
- THEN clmns.max_length/2
- ELSE clmns.max_length END AS INT) AS VARCHAR(20)) + '</td>',
- '<td>' + CAST(CAST(clmns.precision AS INT) AS VARCHAR(20)) + '</td>',
- '<td>' + CAST(CAST(clmns.scale AS INT) AS VARCHAR(20)) + '</td>',
- '<td>' + CAST(clmns.is_nullable AS VARCHAR(20)) + '</td>' ,
- '<td>' + CAST(clmns.is_computed AS VARCHAR(20)) + '</td>' ,
- '<td>' + CAST(clmns.is_identity AS VARCHAR(20)) + '</td>' ,
- '<td>' + isnull(CAST(cnstr.definition AS VARCHAR(20)),'') + '</td>'
- FROM sys.tables AS tbl
- INNER JOIN sys.all_columns AS clmns
- ON clmns.object_id=tbl.object_id
- LEFT OUTER JOIN sys.indexes AS idx
- ON idx.object_id = clmns.object_id
- AND 1 =idx.is_primary_key
- LEFT OUTER JOIN sys.index_columns AS idxcol
- ON idxidxcol.index_id = idx.index_id
- AND idxcol.column_id = clmns.column_id
- AND idxcol.object_id = clmns.object_id
- AND 0 = idxcol.is_included_column
- LEFT OUTER JOIN sys.types AS udt
- ON udt.user_type_id = clmns.user_type_id
- LEFT OUTER JOIN sys.types AS typ
- ON typ.user_type_id = clmns.system_type_id
- AND typtyp.user_type_id = typ.system_type_id
- LEFT JOIN sys.default_constraints AS cnstr
- ON cnstr.object_id=clmns.default_object_id
- LEFT OUTER JOIN sys.extended_properties exprop
- ON exprop.major_id = clmns.object_id
- AND exprop.minor_id = clmns.column_id
- AND exprop.name = 'MS_Description'
- WHERE (tbl.name = @TableName and
- exprop.class = 1) --I don't wand to include comments on indexes
- ORDER BY clmns.column_id ASC
- PRINT '</tr></table>'
- FETCH NEXT FROM Tbls
- INTO @TableName
- END
- PRINT '</body></HTML>'
- CLOSE Tbls
- DEALLOCATE Tbls
這個腳本將被安排作為一個工作來運行，所以你不需要擔心要手動更新文檔。
因為你將文檔存儲在數據庫中，所以你不必擔心擁有多個拷貝并指出哪個是***的。它還會與數據庫一起備份。
以上的相關內容就是對HTML格式的SQL Server數據字典 的介紹，望你能有所收獲。
【編輯推薦】
責任編輯：佚名
來源：
清華大學出版社
