使用指定压缩选项的ALTER TABLE ... REBUILD选项来修改表。 要删除聚集索引,OFFLINE操作的执行速度很快,因为只会移除较高级别的聚集索引。 如果ONLINE删除聚集索引,SQL Server 必须重新生成堆两次,一次针对步骤 1,一次针对步骤 2。 压缩对复制的影响 如果将数据压缩与复制一起使用,则应注意以下事项: ...
使用CREATE table语句的COMPRESS子句指定表压缩。通过在ALTER table语句中使用这些子句,可以对现有表启用压缩。在这种情况下,仅压缩启用压缩后插入或更新的数据。使用ALTER TABLE MOVE语句还可以对插入和更新的数据进行压缩,但它也会压缩现有数据。类似地,可以使用ALTER table…NOCOMPRESS语句禁用现有压缩表的表压缩。在这种...
/*** Object: Table [dbo].[test_compress] Script Date: 2018/3/7 13:46:43 ***/ SET ANSI_NULLS OFF GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[test_compress_ROW]( ... ... ... CONSTRAINT [test_compress_ROW_pk] PRIMARY KEY CLUSTERED ( ... ... ... )WITH (PAD_INDEX...
Types de tables Tâches de table communes Voir aussi S’applique à : SQL Server 2016 (13.x) et versions ultérieures Base de données Azure SQL Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)Les tables sont des objets de base de données qui contiennent...
CREATE TABLE ( _id int primary key identity, name nvarchar( max ), surname nvarchar( max ), info varbinary( max ), info_json as CAST (decompress(info) as nvarchar( max )) ); COMPRESS和DECOMPRESS实战 SQL Server 2016的新特性可以使用COMPRESS和DECOMPRESS函数在DML(INSERT/SELECT/UPDATE...
Requires ALTER permission on the table or index.Use SQL Server Management StudioIn Object Explorer, expand the database that contains the table that you want to compress and then expand the Tables folder. To compress an index, expand the table that contains the index that you want to ...
This statement first deletes old player records from theplayertable. To save space, it then stores the records in theinactivePlayertable, in a compressed format. SQLคัดลอก DELETEFROMplayerOUTPUTdeleted.id, deleted.name, deleted.surname, deleted.datemodifier,COMPRESS(deleted.info)INT...
This statement first deletes old player records from theplayertable. To save space, it then stores the records in theinactivePlayertable, in a compressed format. SQL DELETEFROMplayerOUTPUTdeleted.id, deleted.name, deleted.surname, deleted.datemodifier,COMPRESS(deleted.info)INTOdbo.inactivePlayersWHERE...
若要卸除叢集索引及變更資料分割配置,您需要執行以下步驟: 卸除叢集索引。 使用指定壓縮選項的 ALTER TABLE ... REBUILD 選項來修改資料表。 卸除叢集索引 OFFLINE 是一項快速操作,因為只會移除叢集索引的上層。 卸除叢集索引 ONLINE 時,SQL Server 必須重建堆積兩次,一次在步驟 1,另一次在步驟 2。
/*this script works to compress pages of tables of all database of the server, skipping those which were compressed and system databases like master, msdb, tempdb, model*//*first of all, get the datbase list to construct the sql**/IFobject_id('tempdb..#t')ISNOTNULLBEGINDROPTABLE#tEND...