DBCC DBREINDEX in next versions

DBCC DBREINDEX rebuilds one or more indexes for a table in the specified database.
This was the command which we used to rebuild the indexes.
This feature will be removed in the next version (after 10.0 or SQL Server 2008) of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Use Alter INDEX command to reorganize or rebuild indexes instead.
Below query would reorganize the table if table fragementation is between 10.0 to 30.0 and Rebuild the index if table fragementation is above 30.0


use DB_name
go
SET NOCOUNT ON;
DECLARE @objectid int;
DECLARE @indexid int;
DECLARE @partitioncount bigint;
DECLARE @schemaname nvarchar(130);
DECLARE @objectname nvarchar(130);
DECLARE @indexname nvarchar(130);
DECLARE @partitionnum bigint;
DECLARE @partitions bigint;
DECLARE @frag float;
DECLARE @command nvarchar(4000);
SELECT
    object_id AS objectid,
    index_id AS indexid,
    partition_number AS partitionnum,
    avg_fragmentation_in_percent AS frag
INTO #Temp
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL,'LIMITED')
WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 0;
DECLARE partitions CURSOR FOR SELECT * FROM #Temp

OPEN partitions

WHILE (1=1)

    BEGIN

        FETCH NEXT

           FROM partitions

           INTO @objectid, @indexid, @partitionnum, @frag;

        IF @@FETCH_STATUS < 0 BREAK;

        SELECT @objectname = QUOTENAME(o.name), @schemaname =QUOTENAME(s.name)

        FROM sys.objects AS o

        JOIN sys.schemas as s ON s.schema_id = o.schema_id

        WHERE o.object_id = @objectid;

        SELECT @indexname = QUOTENAME(name)

        FROM sys.indexes

        WHERE  object_id = @objectid AND index_id = @indexid;

        SELECT @partitioncount = count (*)

        FROM sys.partitions

        WHERE object_id = @objectid AND index_id = @indexid;

        IF @frag < 30.0

            SET @command = N'ALTER INDEX ' + @indexname + N' ON ' +@schemaname + N'.' + @objectname + N' REORGANIZE';

        IF @frag >= 30.0

            SET @command = N'ALTER INDEX ' + @indexname + N' ON ' +@schemaname + N'.' + @objectname + N' REBUILD';

        IF @partitioncount > 1

            SET @command = @command + N' PARTITION=' +CAST(@partitionnum AS nvarchar(10));

        EXEC (@command);

        PRINT N'Executed: ' + @command;

    END;

CLOSE partitions;

DEALLOCATE partitions;

DROP TABLE #Temp

GO

Note: Rebuilding a clustered index does not rebuild associated non-clustered indexes unless the keyword ALL is specified

When ALL is specified, all indexes on the table are dropped and rebuilt in a single transaction.

USE DB_name;

GO

ALTER INDEX ALL ON schema.table_name

REBUILD WITH (SORT_IN_TEMPDB = ON,

              STATISTICS_NORECOMPUTE = ON);

GO

This piece of information was shared to me by Kumaravyas. 

Thanks to Kumaravyas for sharing this useful info.