请问谁有比较好的索引和索引碎片优化和整理的例子
请问谁有比较好的索引和索引碎片优化和整理的例子,能不能共享出来一下,谢谢
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--结合sys.indexes和sys.index_columns,sys.objects,sys.columns查询索引所属的表或视图的信息select o.name as 表名, i.name as 索引名, c.name as 列名, i.type_desc as 类型描述, is_primary_key as 主键约束, is_unique_constraint as 唯一约束, is_disabled as 禁用from sys.objects o inner join sys.indexes ion i.object_id=o.object_idinner join sys.index_columns icon ic.index_id=i.index_id and ic.object_id=i.object_idinner join sys.columns con ic.column_id=c.column_id and ic.object_id=c.object_idgo--查询索引的键和列信息select o.name as 表名, i.name as 索引名, c.name as 字段编号,from sysindexes i inner join sysobjects o on i.id=o.idinner join sysindexkeys k on o.id=k.id and i.indid=k.indidinner join syscolumns c on c.id=i.id and k.colid=c.colidwhere o.name='表名'--查询数据库db中表tb的所有索引的碎片情况use dbgoselect a.index_id,---索引编号 b.name,---索引名称 avg_fragmentation_in_percent---索引的逻辑碎片from sys.dm_db_index_physical_stats(db_id(),object_id(N'create.consume'),null,null,null) as ajoin sys.indexes as bon a.object_id=b.object_id and a.index_id=b.index_idgo---解释下sys.dm_db_indx_physical_stats的参数datebase_id: 数据库编号,可以使用db_id()函数获取指定数据库名对应的编号。object_id: 该索引所属表或试图的编号index_id: 该索引的编号partition_number:对象中分区的编号mode:模式名称,用于指定获取统计信息的扫描级别。有关sys.dm_db_indx_physical_stats的结果集中的字段名去查下联机丛书。
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