2012-04-27 103 views
1

我正在使用SQL Server 2008并关闭下面的示例HERE搜索数据库中的所有表并返回一个值?

以下是我到目前为止的代码。 (唯一的区别是将它从存储过程转换为查询并删除了不需要的模式名称。)

我想要做的是在结果中添加另一列并给出第一列的数据值。换句话说,如果每个表都以主键开始,那么我的结果将包括找到数据的行的主键。这甚至有可能吗?谢谢。

DECLARE @DataToFind nvarchar(MAX) = '' 
DECLARE @ExactMatch BIT = 0 

DECLARE @Temp TABLE(RowId INT IDENTITY(1,1), SchemaName sysname, TableName sysname, ColumnName SysName, DataType VARCHAR(100), DataFound BIT) 

    INSERT INTO @Temp(TableName,SchemaName, ColumnName, DataType) 
    SELECT C.Table_Name,C.TABLE_SCHEMA, C.Column_Name, C.Data_Type 
    FROM Information_Schema.Columns AS C 
      INNER Join Information_Schema.Tables AS T 
       ON C.Table_Name = T.Table_Name 
     AND C.TABLE_SCHEMA = T.TABLE_SCHEMA 
    WHERE Table_Type = 'Base Table' 
      And Data_Type In ('ntext','text','nvarchar','nchar','varchar','char') 


DECLARE @i INT 
DECLARE @MAX INT 
DECLARE @TableName sysname 
DECLARE @ColumnName sysname 
DECLARE @SchemaName sysname 
DECLARE @SQL NVARCHAR(4000) 
DECLARE @PARAMETERS NVARCHAR(4000) 
DECLARE @DataExists BIT 
DECLARE @SQLTemplate NVARCHAR(4000) 

SELECT @SQLTemplate = CASE WHEN @ExactMatch = 1 
          THEN 'If Exists(Select * 
              From ReplaceTableName 
              Where Convert(nVarChar(4000), [ReplaceColumnName]) 
                 = ''' + @DataToFind + ''' 
             ) 
            Set @DataExists = 1 
           Else 
            Set @DataExists = 0' 
          ELSE 'If Exists(Select * 
              From ReplaceTableName 
              Where Convert(nVarChar(4000), [ReplaceColumnName]) 
                 Like ''%' + @DataToFind + '%'' 
             ) 
            Set @DataExists = 1 
           Else 
            Set @DataExists = 0' 
          END, 
     @PARAMETERS = '@DataExists Bit OUTPUT', 
     @i = 1 

SELECT @i = 1, @MAX = MAX(RowId) 
FROM @Temp 

WHILE @i <= @MAX 
    BEGIN 
     SELECT @SQL = REPLACE(REPLACE(@SQLTemplate, 'ReplaceTableName', QUOTENAME(SchemaName) + '.' + QUOTENAME(TableName)), 'ReplaceColumnName', ColumnName) 
     FROM @Temp 
     WHERE RowId = @i 


     PRINT @SQL 
     EXEC SP_EXECUTESQL @SQL, @PARAMETERS, @DataExists = @DataExists OUTPUT 

     IF @DataExists =1 
      UPDATE @Temp SET DataFound = 1 WHERE RowId = @i 

     SET @i = @i + 1 
    END 

SELECT TableName, ColumnName 
FROM @Temp 
WHERE DataFound = 1 

回答

1

返回主键是绝对有可能的。您将需要:

  • 确定名称,如果每个表中的主键列或列。如果你可以坚持一个专栏,它会让你的生活更轻松。
  • 添加一个变量的主键值的内容,说@PrimaryKeyValue
  • 修改@SQLTemplate此列的值返回为@PrimaryKeyValue,像这样:

    SELECT @SQLTemplate = CASE WHEN @ExactMatch = 1 
              THEN 'select @PrimaryKeyValue = min(' + @PrimaryKeyColumnName + ') 
                from ReplaceTableName 
                where Convert(nVarChar(4000), [ReplaceColumnName]) = ''' + @DataToFind + ''')' 
              ELSE 'select @PrimaryKeyValue = min(' + @PrimaryKeyColumnName + ') 
                from ReplaceTableName 
                where Convert(nVarChar(4000), [ReplaceColumnName]) Like ''%' + @DataToFind + '%'')' 
             END, 
         @PARAMETERS = '@PrimaryKeyValue nvarchar(4000) OUTPUT', 
         @i = 1 
    
相关问题