インデックスの断片化を調査するSQLは以下の通り SELECT DB_NAME(database_id) as db_name ,OBJECT_NAME(object_id) as table_name ,(select min(name) from sys.indexes where sys.indexes.object_id = sys.dm_db_index_physical_stats.object_id and sys.indexes.index_id = sys.dm_db_index_physical_stats.index_id)as index_name ,index_type_desc ,avg_fragmentation_in_percent --断片化の割合 ,fragment_count --インデックス内の断片化の数 ,avg_fragment_size_in_