Maximum values of various objects defined in SQL Server Replication. Expand table SQL Server Replication objectMaximum values for SQL Server(64-bit)Additional information Articles (merge publication) 2,048 Articles (snapshot or transactional publication) 32,767 Columns in a table (merge publication...
You can define a key using variable-length columns whose maximum sizes add up to more than 900, provided no row is ever inserted with more than 900 bytes of data in those columns. In SQL Server, you can include nonkey columns in a nonclustered index to avoid the maximum index key size...
The maximum size of a wide table row is 8,019 bytes. Therefore, most of the data in any particular row should be NULL. The maximum number of nonsparse columns plus computed columns in a wide table remains 1,024. Wide tables have the following performance implications. Wide tables can ...
USE AdventureWorks2022; GO SELECT TABLE_NAME, COLUMN_NAME, COLUMNPROPERTY(OBJECT_ID(TABLE_SCHEMA + '.' + TABLE_NAME), COLUMN_NAME, 'ColumnID') AS COLUMN_ID FROM AdventureWorks2022.INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Person'; GO Voir...
SQL Server Agent是SQL Server中的一个Windows 服务,该服务用来运行制定的计划任务。计划任务其实是在SOL Server中定义的一个程序,该程序不需要干预即可自动开始执行。与tempdb和model 数据库一样,在使用SQL Server时也不要直接修改msdb数据库,SOL Server中的一些程序会自动使用该数据库。例如,当用户对数据进行存储...
A. Inserting multiple rows of data The following example creates the tabledbo.Departmentsand then uses the table value constructor to insert five rows into the table. Because values for all columns are supplied and are listed in the same order as the columns in the table, the column names do...
widenativeNative (database) data types, except inchar,varchar, andtextcolumns, in which data is stored as Unicode. Create thewidenativedata file by bulk importing data from SQL Server using thebcputility. Thewidenativevalue offers a higher performance alternative towidechar. If the data file con...
Therefore, the guidance is to always create an index on foreign key columns in a memory-optimized table. For more detailed considerations about validation failures caused by foreign key violations, see this blog post by the SQL Server Customer Advisory Team. 41325 Serializable validation failure. ...
When you execute a DBCC CHECKDB or DBCC CHECKTABLE command, SQL Server performs "data purity" validations of column values in each row of every table in the database. These checks are performed to ensure that the values stored in the columns are valid. That is, the validation ensures the ...
本文是微软的译文,对应的原文是:https://www.red-gate.com/simple-talk/sql/database-administration/migrating-disk-based-table-memory-optimized-table-sql-server/ 以前称为Hekaton的特性,现在是内存中的OLTP,可以提供非常有用的性能提升,您可以仔细地选择表来进行内存优化。如何将现有表转换为内存优化的表呢?这个...