从所有引用表中计算对特定行的引用

现在我拥有列出所有引用表的代码，并且我可以从表中逐一计数引用。从所有引用表中计算对特定行的引用

查询1：

SELECT t.NAME AS TableWithForeignKey, 
    c.NAME AS ForeignKeyColumn 
FROM sys.foreign_key_columns AS fk 
INNER JOIN sys.tables AS t 
    ON fk.parent_object_id = t.object_id 
INNER JOIN sys.columns AS c 
    ON fk.parent_object_id = c.object_id 
     AND fk.parent_column_id = c.column_id 
WHERE fk.referenced_object_id = (
     SELECT object_id 
     FROM sys.tables 
     WHERE NAME = 'MAIN_TABLE' 
     )

查询2：

SELECT COUNT(MAIN_ID) 
FROM MAIN_TABLE 
INNER JOIN REF_TABLE_1 
    ON MAIN_TABLE.ID = REF_TABLE_1.MAIN_ID

查询3：

SELECT COUNT(MAIN_ID) 
FROM MAIN_TABLE 
INNER JOIN REF_TABLE_2 
    ON MAIN_TABLE.ID = REF_TABLE_2.MAIN_ID

等

是否有可能把它在一个查询？

来源

2012-09-07 rofrol

这是相当复杂的，它取决于（ouch）你想做什么。我认为这些资源可能会帮助您解决问题： http://www.databasejournal.com/features/mssql/article.php/3571026/Finding-Database-Object-Dependencies.htm http://beyondrelational.com/modules /2/blogs/28/posts/10399/tsql-lab-9-how-to-find-the-dependency-chain-of-a-database-object.aspx http://msdn.microsoft.com/en-我们/图书馆/ t9x04ed2.aspx希望这可以帮助 –

哦，这和http://blog.sqlauthority.com/2010/02/04/sql-server-get-the-list-of-object-dependencies-sp_depends-and- information_schema-routines-and-sys-dm_sql_referencing_entities/ –

我会看看这篇关于子查询的文章：http://allenbrowne.com/subquery-01.html它不清楚（对我来说）你的意思是什么REF_TABLE_1等。外部连接，子查询和联合，我会这么认为，或者你可以动态地构建你的SQL并使用sp_ExecuteSQL在单个表中获得结果？ –

我试图通过使用SQL块语句而不是单个查询来解决它。请尝试使用，如果它解决了您的问题。你也可以为它创建一个存储过程。

BEGIN 
    CREATE TABLE #tempTable (TName NVARCHAR(100), FKey NVARCHAR(100), RCount BIGINT) 

    INSERT INTO #tempTable(TName, FKey) 
    SELECT t.NAME AS TableWithForeignKey, 
     c.NAME AS ForeignKeyColumn 
    FROM sys.foreign_key_columns AS fk 
    INNER JOIN sys.tables AS t 
     ON fk.parent_object_id = t.object_id 
    INNER JOIN sys.columns AS c 
     ON fk.parent_object_id = c.object_id 
      AND fk.parent_column_id = c.column_id 
    WHERE fk.referenced_object_id = ( 
      SELECT object_id 
      FROM sys.tables 
      WHERE NAME = ''MAIN_TABLE' 
      ) 

    SELECT * FROM #tempTable 

    DECLARE tempT CURSOR FOR SELECT TName FROM #tempTable 

    DECLARE @tn NVARCHAR(100) 

    OPEN tempT 

    FETCH NEXT FROM tempT INTO @tn 

    WHILE @@FETCH_STATUS = 0 
    BEGIN 
     EXEC (N'UPDATE #tempTable SET RCount = (SELECT COUNT(*) FROM ' + @tn + ') WHERE TName =''' + @tn + '''') 

     FETCH NEXT FROM tempT INTO @tn 
    END 
    CLOSE tempT; 
    DEALLOCATE tempT; 

    SELECT * FROM #tempTable 
    DROP TABLE #tempTable 

END

来源

2012-09-10 04:40:26 Nitesh

从所有引用表中计算对特定行的引用

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