When working with SQL Server, sometimes there is a need to create new tables to accomplish a task. Most of the data you need probably already exists in the database, but you may need to create a new table to import data or create a new table as a subset of other tables. In this a...
從SQL Server 2016 (13.x)開始,您可以在叢集列存儲索引上建立一個或多個一般的非叢集行存儲或 B-樹索引。 非叢集 B 樹索引可以加快具有等值述詞或是值範圍較小的述詞的查詢。 For more complicated predicates, the query optimizer might choose a full table scan. 若無法略過數據列群組,...
Expand table SQL Server versionExecution metricStatistic function SQL Server 2016 (13.x) CPU time, Duration, Execution count, Logical reads, Logical writes, Memory consumption, Physical reads, CLR time, Degree of parallelism (DOP), and Row count Average, Maximum, Minimum, Standard Deviation,...
Real-time alerts for critical SQL Server changes: Our library of audit reports includes granular details on login changes, top users, active databases, object and table changes, replication, and roles, among others. Each report provides information on who made the change, what was changed, when ...
Applies To: SQL Server 2005 Summary: The I/O system is important to the performance of SQL Server. When configuring a new server for SQL Server or when adding or modifying the disk configuration of an existing system, it is good practice to determine the capacity of the I/O subsystem prio...
Introduction to New T-SQL Programmability Features in SQL Server 2008 Introduction to Spatial Coordinate Systems: Flat Maps for a Round Planet Migrating DTS Packages to Integration Services Migrating to SQL Server from Other Database Products Partitioned Table and Index Strategies Using SQL Server 2008...
Install the new version of SQL Server during a maintenance window. Fail over the availability group to the secondary replica so it is not primary during the installation of the new SQL Server instance. Rolling upgrade process In practice, the exact process depends on factors such as the deployme...
For an introduction to backup in SQL Server, see Backup Overview. Backup types The supported backup types depend on the recovery model of the database, as follows All recovery models support full and differential backups of data. Expand table Scope of backupBackup types Whole database Database...
The sysprocesses system table After you install SQL Server 2005 Service Pack 2 (SP2), SQL Server logs an error message in the error log when SQL Server detects that the high resolution timers are out of sync between the CPUs. The...
Table relationships: SQL table relationships connect data between tables using keys, thereby organizing data in an efficient and meaningful way SQL Operators Operators in Microsoft SQL Server are used to perform a variety of operations on data. These include arithmetic, comparison, logical, bitwise, ...