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SQL Query to search for a specific value in a database where table and field names are unknown

Posted on 2007-10-08
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Last Modified: 2008-06-05
I have a rather large database that contains about 3500 tables.  I have a specific value that exists in one of the fields in side one of the tables but don't have a clue as to which table, much less field.  Is there a way to mine this data using some sort of a SQL query?  Consequently, the value I am searching for is 200611.

TIA for any guidance at all!

Oh, and this is for SQL Server 2000.
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Question by:dstjohnjr
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Bradley Haynes earned 500 total points
ID: 20037310
Here is a script you can modify for your numeric value:


How to search all columns of all tables in a database for a keyword?


While browsing the SQL Server newsgroups, every once in a while, I see a request for a script that can search all the columns of all the tables in a given database for a specific keyword. I never took such posts seriously. But then recently, one of my network administrators was troubleshooting a problem with Microsoft Operations Manager (MOM). MOM uses SQL Server for storing all the computer, alert and performance related information. He narrowed the problem down to something specific, and needed a script that can search all the MOM tables for a specific string. I had no such script handy at that time, so we ended up searching manually.

That's when I really felt the need for such a script and came up with this stored procedure "SearchAllTables". It accepts a search string as input parameter, goes and searches all char, varchar, nchar, nvarchar columns of all tables (only user created tables. System tables are excluded), owned by all users in the current database. Feel free to extend this procedure to search other datatypes.

The output of this stored procedure contains two columns:

- 1) The table name and column name in which the search string was found
- 2) The actual content/value of the column (Only the first 3630 characters are displayed)

Here's a word of caution, before you go ahead and run this procedure. Though this procedure is quite quick on smaller databases, it could take hours to complete, on a large database with too many character columns and a huge number of rows. So, if you are trying to run it on a large database, be prepared to wait (I did use the locking hint NOLOCK to reduce any locking). It is efficient to use Full-Text search feature for free text searching, but it doesn't make sense for this type of ad-hoc requirements.

Create this procedure in the required database and here is how you run it:

--To search all columns of all tables in Pubs database for the keyword "Computer"
EXEC SearchAllTables 'Computer'
GO

Here is the complete stored procedure code:


CREATE PROC SearchAllTables
(
      @SearchStr nvarchar(100)
)
AS
BEGIN

      -- Copyright © 2002 Narayana Vyas Kondreddi. All rights reserved.
      -- Purpose: To search all columns of all tables for a given search string
      -- Written by: Narayana Vyas Kondreddi
      -- Site: http://vyaskn.tripod.com
      -- Tested on: SQL Server 7.0 and SQL Server 2000
      -- Date modified: 28th July 2002 22:50 GMT


      CREATE TABLE #Results (ColumnName nvarchar(370), ColumnValue nvarchar(3630))

      SET NOCOUNT ON

      DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
      SET  @TableName = ''
      SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')

      WHILE @TableName IS NOT NULL
      BEGIN
            SET @ColumnName = ''
            SET @TableName =
            (
                  SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
                  FROM       INFORMATION_SCHEMA.TABLES
                  WHERE             TABLE_TYPE = 'BASE TABLE'
                        AND      QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
                        AND      OBJECTPROPERTY(
                                    OBJECT_ID(
                                          QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)
                                           ), 'IsMSShipped'
                                           ) = 0
            )

            WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
            BEGIN
                  SET @ColumnName =
                  (
                        SELECT MIN(QUOTENAME(COLUMN_NAME))
                        FROM       INFORMATION_SCHEMA.COLUMNS
                        WHERE             TABLE_SCHEMA      = PARSENAME(@TableName, 2)
                              AND      TABLE_NAME      = PARSENAME(@TableName, 1)
                              AND      DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar')
                              AND      QUOTENAME(COLUMN_NAME) > @ColumnName
                  )
      
                  IF @ColumnName IS NOT NULL
                  BEGIN
                        INSERT INTO #Results
                        EXEC
                        (
                              'SELECT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630)
                              FROM ' + @TableName + ' (NOLOCK) ' +
                              ' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2
                        )
                  END
            END      
      END

      SELECT ColumnName, ColumnValue FROM #Results
END

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by:dstjohnjr
ID: 20037425
That works!  Thank you!
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