如需索引設計指導方針的詳細資訊,請參閱 SQL Server 索引設計指南。範例:在資料表或檢視上建立非叢集索引 SQL 複製 CREATE INDEX index1 ON schema1.table1 (column1); 在資料表上建立叢集索引並為資料表使用 3 部分名稱 SQL 複製 CREATE CLUSTERED INDEX index1 ON database1.schema1.table1 (column1)...
CREATE UNIQUE INDEX index1 ON schema1.table1 (column1 DESC, column2 ASC, column3 DESC); 主要方案:从SQL Server 2016 (13.x) 和 SQL 数据库开始,可针对列存储索引使用非聚集索引来提高数据仓库查询性能。 有关详细信息,请参阅列存储索引 - 数据仓库。有...
The following DDL statements are not permitted under snapshot isolation after a BEGIN TRANSACTION statement: ALTER TABLE, CREATE INDEX, CREATE XML INDEX, ALTER INDEX, DROP INDEX, DBCC REINDEX, ALTER PARTITION FUNCTION, ALTER PARTITION SCHEME, or any common language runtim...
ALTER TABLE [dbo].[EmpTypeLimit] ADD PRIMARY KEY CLUSTERED ([Id]) WITH (ONLINE=ON); 1. 建聚集索引(不含主键) CREATE CLUSTERED INDEX CIX_TransactionID ON TransactionHistory(ID); 1. 建非聚集索引 CREATE NONCLUSTERED INDEX [Ind_name] ON [dbo].[table_name] ( col1,col2 desc ) WITH (PA...
CREATE TABLE, ALTER TABLE, or CREATE INDEX syntax without parentheses around the options. Rewrite the statement to use the current syntax. INDEX_OPTION 33 Database objects Ability to return result sets from triggers None Returning results from trigger ...
Although this looks similar to accessing the sysobjects table in SQL Server 2000, the data columns returned will be different. To allow a little more backward compatibility, there is also a set of views called compatibility views which have exactly the same names, and present data in the same...
[ODBC SQL Server Driver] Invalid Parameter Number/ Invalid Description or Index [Sql server 2012] Change from vertical to horizontal table as dynamic @@FETCH_STATUS in nested loops @@ServerName returns wrong value in SQL SERVER 2008 ##TempTable and INSERT-SELECT FROM an existing Table with an...
included in that row, the more a column-partitioning approach may be attractive. Application queuing and state tables can sometimes benefit from this approach. SQL Server 2008 adds the ability to disable lock escalations per partition (or per table when partitions are not enabled for the table)....
SQL Server has introduced the locking hierarchy that is applied when reading or changing of data is performed. The lock hierarchy starts with the database at the highest hierarchy level and down via table and page to the row at the lowest level ...
The appropriate lock type is established to protect the row, range, page, or table as necessary. Refer to the SQL Server Books Online locking sections for more details about lock types.Looking at the example in more detail, you might ask what happens when the LazyWriter or C...