[ database_name. [ owner_name ] . | owner_name. ] table_or_view_name } <backward_compatible_index_option> ::= { PAD_INDEX | FILLFACTOR = fillfactor | SORT_IN_TEMPDB | IGNORE_DUP_KEY | STATISTICS_NORECOMPUTE | DROP_EXISTING } 参数: UNIQUE:为表或视图创建唯一索引。 唯一索引不允许两行...
[ database_name. [ owner_name ] . | owner_name. ] table_or_view_name } <backward_compatible_index_option> ::= { PAD_INDEX | FILLFACTOR = fillfactor | SORT_IN_TEMPDB | IGNORE_DUP_KEY | STATISTICS_NORECOMPUTE | DROP_EXISTING } 参数: UNIQUE:为表或视图创建唯一索引。 唯一索引不允许两行...
复制 CREATE[UNIQUE][CLUSTERED|NONCLUSTERED]INDEXindex_nameON<object>(column_name[ASC|DESC][,...n])[WITH<backward_compatible_index_option>[,...n]][ON{filegroup_name|"default"}]<object>::={[database_name.[owner_name].|owner_name.]table_or_view_name}<backward_compatible_index_option>::...
Learn how to enable compression on a table or index in SQL Server by using SQL Server Management Studio or Transact-SQL.
CREATE INDEX index_name on table_name (column1, column2) 隐式索引(Implicit Indexes)# 当创建primary key constraints and unique constraints.时会自动创建隐士索引 全文索引# 一种特殊类型的基于标记的功能性索引,由Microsoft SQL Server全文引擎生成和维护。用于帮助在字符串数据中搜索复杂的词。这种索引的结构...
sql server 创建变量表index sql新建变量 注: 以下测试案例所用的表均来自与scott方案,使用前,请确保该用户解锁. 1、简介 和大多数编程语言一样,在编写PL/SQL程序时,可以定义常量和变量,在pl/sql程序中包括有: a、标量类型(Scalar) b、复合类型(Composite)...
通过rowid扫描(table access by rowid),如果知道数据的rowid,那么直接通过rowid进行查找 索引扫描(index scan),如果一个表创建了索引,那么可以通过索引来找出我们想要的数据在表中的存放位置,也就是rowid,通过返回rowid然后用rowid来进行访问具体数据。 而索引扫描中又可分为索引全扫描(index full scan)、索引范围扫描...
程序集: Microsoft.SqlServer.TransactSql.ScriptDom(在 Microsoft.SqlServer.TransactSql.ScriptDom.dll 中) 语法C# 复制 [SerializableAttribute] public class IndexTableHint : TableHint IndexTableHint 类型公开以下成员。构造函数展开表 名称说明 IndexTableHint Initializes a new instance of the IndexTableHint...
So how does SQL Server determine, which partition a row of a partitioned table belongs to? For this, we first have to identify the column by which the table is being partitioned. The data type of this column defines the maximum range of possible values, e.g. for integer the...
Applies to: SQL Server 2014 (12.x) and later versions ASWITCHor online index rebuild completes as soon as there are no blocking operations for this table.WAIT_AT_LOW_PRIORITYindicates that if theSWITCHor online index rebuild operation can't be completed immediately, it waits. The operation ho...