Updating tables in sql server

Applies to: SQL Server 2014 through SQL Server 2017 and Azure SQL Database. Memory optimized tables are in-memory user tables, the schema of which is persisted on disk similar to other user tables. For more information, see Metadata Visibility Configuration.The following are the possible values: 0 = not memory optimized. Memory optimized tables can be accessed from natively compiled stored procedures. Applies to: SQL Server 2016 through SQL Server 2017, Azure SQL Database, and Azure SQL Data Warehouse. The following example returns all of the user tables that do not have a primary key.For that reason, having accurate and up-to-date statistics is crucial.In contrast, if you have invalid or out-of-date statistics, it can lead the SQL Server engine to take the wrong path to the data, and taking the wrong path means that an index scan is made when an index seek would have been appropriate or a seek is performed against the wrong index.There's the sp_updatestats procedure that accepts a single input parameter called @resample.The @resample parameter triggers the procedure to get a fresh sample of records from the table, instead of using the prior sample of records.


If you have a table that stays at approximately the same number of rows, but data is added and removed on a regular basis, your statistics will become out of date rather quickly.- sys.filegroups - sys.partition_schemes - sys.indexes - sys.allocation_units - sys.fulltext_catalogs - sys.data_spaces - sys.destination_data_spaces - sys.master_files - sys.database_files - backupfilegroup (join on filegroup_id)Applies to: SQL Server 2014 through SQL Server 2017 and Azure SQL Database.The following are the possible values: SCHEMA_ONLY SCHEMA_AND_DATA The value of SCHEMA_AND_DATA indicates that the table is a durable, in-memory table.However, approximately 1.2 million records were deleted each morning and throughout the day a new 1.2 million records were added.

The primary key for this table was an identity column with a data type of INT.Typically, both should be left enabled for databases.



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