在DB的所有表,行和列中搜索字符串

我迷失在一个大型数据库中,我无法找到我得到的数据来自哪里.我想知道SQL Server 2005是否可以在数据库的所有表,行和列中搜索字符串？

有没有人知道它是否可能以及如何？

这段代码应该在SQL 2005中完成,但有几点需要注意:

它非常缓慢.我在一个小型数据库上进行了测试,我只有少数几个表,并且需要很长时间才能完成.如果您的数据库太大而无法理解,那么无论如何这都可能无法使用.

我把它从袖口上写下来.我没有进行任何错误处理,可能还有一些其他的邋iness,特别是因为我不经常使用游标.例如,我认为有一种方法可以刷新列光标,而不是每次都关闭/取消分配/重新创建它.

如果你无法理解数据库或者不知道来自哪里,那么你应该找到一个人.即使您可以找到数据的位置,也可能在某处复制,或者您可能还有其他不了解的数据库方面.如果贵公司中没有人理解数据库,那么你就是一团糟.

DECLARE
    @search_string  VARCHAR(100),
    @table_name     SYSNAME,
    @table_schema   SYSNAME,
    @column_name    SYSNAME,
    @sql_string     VARCHAR(2000)

SET @search_string = 'Test'

DECLARE tables_cur CURSOR FOR SELECT TABLE_SCHEMA, TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE'

OPEN tables_cur

FETCH NEXT FROM tables_cur INTO @table_schema, @table_name

WHILE (@@FETCH_STATUS = 0)
BEGIN
    DECLARE columns_cur CURSOR FOR SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = @table_schema AND TABLE_NAME = @table_name AND COLLATION_NAME IS NOT NULL  -- Only strings have this and they always have it

    OPEN columns_cur

    FETCH NEXT FROM columns_cur INTO @column_name
    WHILE (@@FETCH_STATUS = 0)
    BEGIN
        SET @sql_string = 'IF EXISTS (SELECT * FROM ' + QUOTENAME(@table_schema) + '.' + QUOTENAME(@table_name) + ' WHERE ' + QUOTENAME(@column_name) + ' LIKE ''%' + @search_string + '%'') PRINT ''' + QUOTENAME(@table_schema) + '.' + QUOTENAME(@table_name) + ', ' + QUOTENAME(@column_name) + ''''

        EXECUTE(@sql_string)

        FETCH NEXT FROM columns_cur INTO @column_name
    END

    CLOSE columns_cur

    DEALLOCATE columns_cur

    FETCH NEXT FROM tables_cur INTO @table_schema, @table_name
END

CLOSE tables_cur

DEALLOCATE tables_cur

我建议你发现自己是第三方工具,例如ApexSQL Search(可能还有其他人,但我使用这个,因为它是免费的).

如果你真的想要SQL方式,你可以尝试使用Sorna Kumar Muthuraj创建的存储过程 - 复制代码如下.只需对模式中的所有表执行此存储过程(使用动态SQL很容易)

CREATE PROCEDURE SearchTables 
 @Tablenames VARCHAR(500) 
,@SearchStr NVARCHAR(60) 
,@GenerateSQLOnly Bit = 0 
AS 

/* 
    Parameters and usage 

    @Tablenames        -- Provide a single table name or multiple table name with comma seperated.  
                        If left blank , it will check for all the tables in the database 
    @SearchStr        -- Provide the search string. Use the '%' to coin the search.  
                        EX : X%--- will give data staring with X 
                             %X--- will give data ending with X 
                             %X%--- will give data containig  X 
    @GenerateSQLOnly -- Provide 1 if you only want to generate the SQL statements without seraching the database.  
                        By default it is 0 and it will search. 

    Samples : 

    1. To search data in a table 

        EXEC SearchTables @Tablenames = 'T1' 
                         ,@SearchStr  = '%TEST%' 

        The above sample searches in table T1 with string containing TEST. 

    2. To search in a multiple table 

        EXEC SearchTables @Tablenames = 'T2' 
                         ,@SearchStr  = '%TEST%' 

        The above sample searches in tables T1 & T2 with string containing TEST. 

    3. To search in a all table 

        EXEC SearchTables @Tablenames = '%' 
                         ,@SearchStr  = '%TEST%' 

        The above sample searches in all table with string containing TEST. 

    4. Generate the SQL for the Select statements 

        EXEC SearchTables @Tablenames        = 'T1' 
                         ,@SearchStr        = '%TEST%' 
                         ,@GenerateSQLOnly    = 1 

*/ 

    SET NOCOUNT ON 

    DECLARE @CheckTableNames Table 
    ( 
    Tablename sysname 
    ) 

    DECLARE @SQLTbl TABLE 
    ( 
     Tablename        SYSNAME 
    ,WHEREClause    VARCHAR(MAX) 
    ,SQLStatement   VARCHAR(MAX) 
    ,Execstatus        BIT  
    ) 

    DECLARE @sql VARCHAR(MAX) 
    DECLARE @tmpTblname sysname 

    IF LTRIM(RTRIM(@Tablenames)) IN ('' ,'%') 
    BEGIN 

        INSERT INTO @CheckTableNames 
        SELECT Name 
          FROM sys.tables 
    END 
    ELSE 
    BEGIN 

        SELECT @sql = 'SELECT ''' + REPLACE(@Tablenames,',',''' UNION SELECT ''') + '''' 

        INSERT INTO @CheckTableNames 
        EXEC(@sql) 

    END 

    INSERT INTO @SQLTbl 
    ( Tablename,WHEREClause) 
    SELECT SCh.name + '.' + ST.NAME, 
            ( 
                SELECT '[' + SC.name + ']' + ' LIKE ''' + @SearchStr + ''' OR ' + CHAR(10) 
                  FROM SYS.columns SC 
                  JOIN SYS.types STy 
                    ON STy.system_type_id = SC.system_type_id 
                   AND STy.user_type_id =SC.user_type_id 
                 WHERE STY.name in ('varchar','char','nvarchar','nchar') 
                   AND SC.object_id = ST.object_id 
                 ORDER BY SC.name 
                FOR XML PATH('') 
            ) 
      FROM  SYS.tables ST 
      JOIN @CheckTableNames chktbls 
                ON chktbls.Tablename = ST.name  
      JOIN SYS.schemas SCh 
        ON ST.schema_id = SCh.schema_id 
     WHERE ST.name <> 'SearchTMP' 
      GROUP BY ST.object_id, SCh.name + '.' + ST.NAME ; 

      UPDATE @SQLTbl 
         SET SQLStatement = 'SELECT * INTO SearchTMP FROM ' + Tablename + ' WHERE ' + substring(WHEREClause,1,len(WHEREClause)-5) 

      DELETE FROM @SQLTbl 
       WHERE WHEREClause IS NULL 

    WHILE EXISTS (SELECT 1 FROM @SQLTbl WHERE ISNULL(Execstatus ,0) = 0) 
    BEGIN 

        SELECT TOP 1 @tmpTblname = Tablename , @sql = SQLStatement 
          FROM @SQLTbl  
         WHERE ISNULL(Execstatus ,0) = 0 



         IF @GenerateSQLOnly = 0 
         BEGIN 

            IF OBJECT_ID('SearchTMP','U') IS NOT NULL 
                DROP TABLE SearchTMP 
            EXEC (@SQL) 

            IF EXISTS(SELECT 1 FROM SearchTMP) 
            BEGIN 
                SELECT Tablename=@tmpTblname,* FROM SearchTMP 
            END 

         END 
         ELSE 
         BEGIN 
             PRINT REPLICATE('-',100) 
             PRINT @tmpTblname 
             PRINT REPLICATE('-',100) 
             PRINT replace(@sql,'INTO SearchTMP','') 
         END 

         UPDATE @SQLTbl 
            SET Execstatus = 1 
          WHERE Tablename = @tmpTblname 

    END 

    SET NOCOUNT OFF 

go

虽然之前提出的解决方案是有效且有效的,但我谦卑地提供了一个更干净,更优雅,性能更好的代码,至少我认为如此.

首先,有人可能会问:为什么有人需要全局代码片段并盲目寻找字符串？嘿,他们已经发明了全文,你不知道吗？

我的回答:我的主要工作是系统集成项目,每当我学习一个很少发生的新的未填充数据库时,发现数据写入的位置非常重要.

此外,我提供的代码是一个更强大和危险的脚本的精简版本,它在整个数据库中搜索和替换文本.

CREATE TABLE #result(
  id      INT IDENTITY, -- just for register seek order
  tblName VARCHAR(255),
  colName VARCHAR(255),
  qtRows  INT
)
go

DECLARE @toLookFor VARCHAR(255)
SET @toLookFor = '[input your search criteria here]'

DECLARE cCursor CURSOR LOCAL FAST_FORWARD FOR
SELECT
  '[' + usr.name + '].[' + tbl.name + ']' AS tblName,
  '[' + col.name + ']' AS colName,
  LOWER(typ.name) AS typName
FROM
  sysobjects tbl
    INNER JOIN(
      syscolumns col
        INNER JOIN systypes typ
        ON typ.xtype = col.xtype
    )
    ON col.id = tbl.id
    --
    LEFT OUTER JOIN sysusers usr
    ON usr.uid = tbl.uid

WHERE tbl.xtype = 'U'
  AND LOWER(typ.name) IN(
        'char', 'nchar',
        'varchar', 'nvarchar',
        'text', 'ntext'
      )
ORDER BY tbl.name, col.colorder
--
DECLARE @tblName VARCHAR(255)
DECLARE @colName VARCHAR(255)
DECLARE @typName VARCHAR(255)
--
DECLARE @sql  NVARCHAR(4000)
DECLARE @crlf CHAR(2)

SET @crlf = CHAR(13) + CHAR(10)

OPEN cCursor
FETCH cCursor
INTO @tblName, @colName, @typName

WHILE @@fetch_status = 0
BEGIN
  IF @typName IN('text', 'ntext')
  BEGIN
    SET @sql = ''
    SET @sql = @sql + 'INSERT INTO #result(tblName, colName, qtRows)' + @crlf
    SET @sql = @sql + 'SELECT @tblName, @colName, COUNT(*)' + @crlf
    SET @sql = @sql + 'FROM ' + @tblName + @crlf
    SET @sql = @sql + 'WHERE PATINDEX(''%'' + @toLookFor + ''%'', ' + @colName + ') > 0' + @crlf
  END
  ELSE
  BEGIN
    SET @sql = ''
    SET @sql = @sql + 'INSERT INTO #result(tblName, colName, qtRows)' + @crlf
    SET @sql = @sql + 'SELECT @tblName, @colName, COUNT(*)' + @crlf
    SET @sql = @sql + 'FROM ' + @tblName + @crlf
    SET @sql = @sql + 'WHERE ' + @colName + ' LIKE ''%'' + @toLookFor + ''%''' + @crlf
  END

  EXECUTE sp_executesql
            @sql,
            N'@tblName varchar(255), @colName varchar(255), @toLookFor varchar(255)',
            @tblName, @colName, @toLookFor

  FETCH cCursor
  INTO @tblName, @colName, @typName
END

SELECT *
FROM #result
WHERE qtRows > 0
ORDER BY id
GO

DROP TABLE #result
go

如果您从应用程序"获取数据",那么明智的做法是使用分析器并在运行应用程序时对数据库进行概要分析.跟踪它,然后在结果中搜索该字符串.

Microsoft SQL Server Management Studio和Microsoft SQL Server Management Studio Express的SSMS工具PACK加载项(加载项)将完全满足您的需求.在较大的数据库上,搜索需要一些时间,但这是可以预期的.它还包括一系列很酷的功能,它们应该首先包含在SQL Server Management Studio中.试一试www.ssmstoolspack.com/

您需要安装用于SQL Server Management Studio的SP2才能运行这些工具.

我改编了一本最初由Narayana Vyas Kondreddi于2002年编写的剧本.我更改了where子句以检查text/ntext字段,使用patindex而不是like.我也略微改变了结果表.不合理的是,我更改了变量名称,并按照我的意愿调整(不尊重Kondretti先生).用户可能想要更改搜索的数据类型.我使用全局表来查询中间处理,但永久表可能是更明智的方法.

/* original script by Narayana Vyas Kondreddi, 2002 */
/* adapted by Oliver Holloway, 2009 */

/* these lines can be replaced by use of input parameter for a proc */
declare @search_string varchar(1000);
set @search_string = 'what.you.are.searching.for';

/* create results table */
create table ##string_locations (
  table_name varchar(1000),
  field_name varchar(1000),
  field_value varchar(8000)
)
;
/* special settings */
set nocount on
;
/* declare variables */
declare
  @table_name varchar(1000),
  @field_name varchar(1000)
;
/* variable settings */
set @table_name = ''
;
set @search_string = QUOTENAME('%' + @search_string + '%','''')
;
/* for each table */
while @table_name is not null
begin

  set @field_name = ''
  set @table_name = (
    select MIN(QUOTENAME(table_schema) + '.' + QUOTENAME(table_name))
    from INFORMATION_SCHEMA.TABLES
    where 
      table_type = 'BASE TABLE' and
      QUOTENAME(table_schema) + '.' + QUOTENAME(table_name) > @table_name and
      OBJECTPROPERTY(OBJECT_ID(QUOTENAME(table_schema) + '.' + QUOTENAME(table_name)), 'IsMSShipped') = 0
  )

  /* for each string-ish field */
  while (@table_name is not null) and (@field_name is not null)
  begin
    set @field_name = (
      select MIN(QUOTENAME(column_name))
      from INFORMATION_SCHEMA.COLUMNS
      where 
        table_schema    = PARSENAME(@table_name, 2) and
        table_name  = PARSENAME(@table_name, 1) and
        data_type in ('char', 'varchar', 'nchar', 'nvarchar', 'text', 'ntext') and
        QUOTENAME(column_name) > @field_name
    )

    /* search that field for the string supplied */
    if @field_name is not null
    begin
      insert into ##string_locations
      exec(
        'select ''' + @table_name + ''',''' + @field_name + ''',' + @field_name + 
        'from ' + @table_name + ' (nolock) ' +
        'where patindex(' + @search_string + ',' + @field_name + ') > 0'  /* patindex works with char & text */
      )
    end
    ;
  end
  ;
end
;

/* return results */
select table_name, field_name, field_value from ##string_locations (nolock)
;
/* drop temp table */
--drop table ##string_locations
;