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SQLSERVER 索引 重建/重組

SELECT    'ALTER INDEX [' + ix.name + '] ON [' + s.name + '].[' + t.name + '] ' +
        CASE WHEN ps.avg_fragmentation_in_percent>15 THEN 'REBUILD' ELSE 'REORGANIZE' END + 
        CASE WHEN pc.partition_count>1 THEN ' PARTITION = ' + CAST(ps.partition_number AS NVARCHAR(MAX))  ELSE '' END,
        avg_fragmentation_in_percent
FROM sys.indexes AS ix INNER JOIN sys.tables t ON t.object_id=ix.object_id INNER JOIN sys.schemas s ON t.schema_id=s.schema_id INNER JOIN (SELECT object_id, index_id, avg_fragmentation_in_percent, partition_number FROM sys.dm_db_index_physical_stats(DB_ID
(), NULL, NULL, NULL, NULL)) ps ON t.object_id=ps.object_id AND ix.index_id=ps.index_id INNER JOIN (SELECT object_id, index_id, COUNT(DISTINCT partition_number) AS partition_count FROM sys.partitions GROUP BY object_id, index_id) pc ON t.object_id=pc.object_id AND ix.index_id=
pc.index_id WHERE ps.avg_fragmentation_in_percent>10 AND ix.name IS NOT NULL;