Using SQL Server Management Studio To create a nonclustered index by using the Table Designer In Object Explorer, expand the database that contains the table on which you want to create a nonclustered index. Expand theTablesfolder. Right-click the table on which you want to create a nonclust...
Using SQL Server Management Studio To create a nonclustered index by using the Table Designer In Object Explorer, expand the database that contains the table on which you want to create a nonclustered index. Expand theTablesfolder. Right-click the table on which you want to create a nonclust...
sqlserver create nonclustered index 文心快码BaiduComate 在SQL Server 中,非聚集索引(Nonclustered Index)是一种数据库索引类型,它不与数据行的物理顺序相对应,而是创建一个独立的索引结构来存储索引键和指向数据行的指针。下面我将根据你的提示,详细解释如何在 SQL Server 中创建非聚集索引。 1. 理解非聚集索引(...
在使用索引创建向导创建索引时,不能将计算列包含在索引中,但在直接创建或使用CREATE INDEX命令创建索引时,则可以对计算机列创建索引,这在SQL Server2000以前的版本中是不允许的,算得上是一大改进。 例8-1: 为表products 创建一个簇索引。 create unique clustered index pk_p_id on products(p_id) with pad_i...
Transact-SQL 语法约定 语法 适用于 SQL Server、Azure SQL 数据库和 Azure SQL 托管实例的语法 syntaxsql 复制 CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predica...
SQL Server都会输出当前计数并开始新的计数。与之前的请求一样,这是一个覆盖查询; SQL Server只访问索引,完全忽略表。Ashton”的人,我们的索引是非常有用的,但是如果这个请求是针对所有名字是“Ashton”的人,那么这个索引几乎没有任何帮助。 测试一些样本查询dbo.Contacts_noindex;并运行该脚本以在dbo.Contacts_index...
Multiple unique nonclustered indexes can be defined on a table. For more information, see CREATE INDEX (Transact-SQL). Indexed view To create an indexed view, a unique clustered index is defined on one or more view columns. The view is executed and the result set is stored in the leaf ...
CREATE [UNIQUE] [NONCLUSTERED] INDEX index_name ON table_name (column_name [ASC|DESC][,…n]) WITH (STATISTICS_NORECOMPUTE = { ON | OFF })] 参数 展开表 术语定义 UNIQUE 在表上创建唯一索引。唯一索引是不允许其中任意两行具有相同索引值的索引。 SQL Server 2005 Compact Edition (SQL Server...
Include nonkey columns in a nonclustered index to avoid exceeding the current index size limitations of a maximum of 32 key columns and a maximum index key size of 1,700 bytes (16 key columns and 900 bytes prior to SQL Server 2016 (13.x)). The Database Engine doesn't consider nonkey...
Include nonkey columns in a nonclustered index to avoid exceeding the current index size limitations of a maximum of 32 key columns and a maximum index key size of 1,700 bytes (16 key columns and 900 bytes prior to SQL Server 2016 (13.x)). The Database Engine doesn't consider nonkey...