Question

我正在使用SQL Server 2008并使用以下示例HERE。

以下是我到目前为止的代码。（唯一的区别是将其转换为存储过程的查询并删除了不必要的模式名称。）

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头，我的结果将包括找到数据的行的主键。这甚至可能吗？感谢。

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

Answer 1

绝对可以返回主键。你需要：

确定每个表中主键列的名称。如果你能坚持一个专栏，它将使你的生活更轻松。
为主键值的内容添加变量，例如@PrimaryKeyValue

修改@SQLTemplate以将此列的值返回到@PrimaryKeyValue，如下所示：

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

搜索数据库中的所有表并返回值？

1 个答案: