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When was data compression introduced in SQL Server?
SQL Server Data Compression (which was first introduced in SQL Server 2008, and is an Enterprise Edition only feature) lets you compress individual indexes with either ROW or PAGE compression.
How does page compression work in SQL Server?
Instead, when row compression is enabled, SQL Server simply removes any extra, unused bytes in a fixed data type column, such as a CHAR (50) column. Page and row compression are not compatible, but by enabling page compression SQL Server automatically includes row compression.
When is SP _ estimate _ data-compression _ savings not supported?
When Memory-Optimized TempDB Metadata is enabled in SQL Server 2019 (15.x), creation of columnstore indexes on temporary tables is not supported. Because of this limitation, sp_estimate_data_compression_savings is not supported with the COLUMNSTORE and COLUMNSTORE_ARCHIVE data compression parameters when Memory-Optimized TempDB Metadata is enabled.
How to monitor compression activity in SQL Server?
You can monitor compression activity with the performance counters Page Compression Attempts/sec and Page Compressed/sec found in the SQL Server Access Methods Object. For example, this Transact-SQL code will query both counters: As mentioned earlier, compression is included only in the Enterprise Edition of SQL Server.
The concept of data compression is not a new on for SQL Server Database Administrators , as it is was introduced the first time in SQL Server 2008. In that SQL Server version, you were able to configure the compression at the row and page levels on the table, index, indexed view or the partition.
Is there a decompression function in SQL Server?
In this way, you can easily decompress the data that is compressed at the application side in your SQL Server instance or decompress the data that is compressed at the SQL Server side in your application, as both are using the same standard algorithm. The basic syntax for the COMPRESS built-in function is:
Can a compression function be used to decompress data?
In this way, you can easily decompress the data that is compressed at the application side in your SQL Server instance or decompress the data that is compressed at the SQL Server side in your application, as both are using the same standard algorithm.
How to effectively compress your data in SQL Server?
This is because SQL Server would have to automatically compress and decompress every data page that it reads or writes. On average, you should expect an additional 5% to 15% increase in CPU utilization. On average, data compression in SQL Server can reduce your data size by 40%.