压缩方式(Compression Type)分为Row和Page两种。 行级压缩(Row): 一方面减少了动态长度字段元数据的大小(varchar、varbinary等),比如之前存储字段实际长度需要2bytes,压缩后只需要3bits。 另一方面也直接减少各字段存储内容的大小,比如存储数值1在一个int类型字段中,压缩后只占用了一个字节。 页级压缩(Page):能在各...
DataCompressionOption DataModificationSpecification DataModificationStatement DataModificationTableReference DataRetentionTableOption DataTypeReference DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement...
DataCompressionOption DataModificationSpecification DataModificationStatement DataModificationTableReference DataRetentionTableOption DataTypeReference DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVar...
if new row goes to an existing page with page compression if the new row is inserted through BULK INSERT with TABLOCK if the new row is inserted through INSERT INTO ... (TABLOCK) SELECT FROM Otherwise, the row is row-compressed. In SQL Server 2016 the TABLOCK hint is required to...
10798 16 No This is not a valid data compression setting for this object. It can only be used with columnstore indexes. Please choose NONE, PAGE, or ROW compression. 10799 16 No This is not a valid data compression setting for a columnstore index. Please choose COLUMNST...
ACE.OLEDB.12.0" for linked server "(null)" Cannot initialize the data source object of OLE DB provider "SQLNCLI11" for linked server " Cannot insert duplicate key row in object 'dbo.blabla..' with unique index 'Idx_blablabl'. The statement has been terminated. at Cannot kill a session ...
If we restore a SQL 2014 R2 EE database, using tab partitioning and page/row compression to a 2016 SP1 instance, those features will be retained ? Anonymous November 28, 2016 There is no SQL 2014 R2. However, if you're referring to restoring a 2014 or 2016 EE DB using those two...
OLTP 工作负荷:如果工作负荷为 DML 繁重(即更新、删除和插入的繁重混合),则可以通过检查 DMVsys. dm_db_column_store_row_group_physical_stats来查看列存储索引碎片。 如果你看到在最近压缩的行组中,> 10% 的行标记为已删除,则可以使用 COMPRESSION_DELAY 选项来增加时间延迟,达到该延迟后...
(es) you are using compression for). So, in Sql 2008, there are 2, yes 2, row/page formats for data. You may now be wondering "well, if the row/page format changed, how in the world did you have enough time to re-engineer every component in Sql Server that is aware of the ...
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