Jul 25, 2014

Search for a string in all tables of SQL Server Database

IF OBJECT_ID('SP_SearchTables','P') IS NOT NULL
    DROP PROCEDURE SP_SearchTables
GO
CREATE PROCEDURE SP_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 SP_SearchTables @Tablenames = 'T1'
                         ,@SearchStr  = '%TEST%'

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

    2. To search in a multiple table

        EXEC SP_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 SP_SearchTables @Tablenames = '%'
                         ,@SearchStr  = '%TEST%'

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

    4. Generate the SQL for the Select statements

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

*/

    SET NOCOUNT ON

    DECLARE @MatchFound BIT

    SELECT @MatchFound = 0

    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
    DECLARE @ErrMsg VARCHAR(100)

    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

    IF NOT EXISTS(SELECT 1 FROM @CheckTableNames)
    BEGIN
       
        SELECT @ErrMsg = 'No tables are found in this database ' + DB_NAME() + ' for the specified filter'
        PRINT @ErrMsg
        RETURN

    END
   
    INSERT INTO @SQLTbl
    ( Tablename,WHEREClause)
    SELECT QUOTENAME(SCh.name) + '.' + QUOTENAME(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','text')
                   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, QUOTENAME(SCh.name) + '.' +  QUOTENAME(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
                SELECT @MatchFound = 1
            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

    IF @MatchFound = 0
    BEGIN
        SELECT @ErrMsg = 'No Matches are found in this database ' + DB_NAME() + ' for the specified filter'
        PRINT @ErrMsg
        RETURN
    END
   
    SET NOCOUNT OFF

go


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