CREATETABLEt1 (idINT);CREATEINDEX id_indexONt1 (id) COMMENT'MERGE_THRESHOLD=40'; 2 create view语句应用 mysql>createindex idx_st_snameonstudents(sname); ##创建普通索引 mysql>createindex idx_st_uniononstudents(sname,sex); ##创建复合索引 mysql>createuniqueindex idx_st_sidonstudents(sid); ##...
Here, the SQL command creates an index namedcollege_indexon theCollegestable using thecollege_codecolumn. SQL CREATE INDEX Syntax The syntax of the SQLCREATE INDEXstatement is: CREATEINDEXindex_nameONtable_name (column_name1, column_name2, ...); Here, index_nameis the name given to the in...
CREATE UNIQUE INDEX index_name ON table_name (column1, column2, ...); Note: The syntax for creating indexes varies among different databases. Therefore: Check the syntax for creating indexes in your database.CREATE INDEX ExampleThe SQL statement below creates an index named "idx_lastname" ...
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...
Syntax SQL Server、Azure SQL Database、Azure SQL 受控執行個體的語法 syntaxsql 複製 CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON ( column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE ( column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( <...
columns or column prefixes. Indeed the following returns an error: 1 2 mysql> ALTER TABLE products ADD INDEX(MONTH(create_time); ERROR 1064 (42000): You have an errorinyour SQL syntax; check the manual that corresponds to your server version for the right syntax to use near '...
CREATE INDEX 语句用于对数据库表定义索引。 可以对 XML 数据或关系数据定义索引。 CREATE INDEX 语句还用于创建索引规范(就是用来向优化器指示数据源表具有索引的元数据)。 调用 此语句可以嵌入在应用程序中,也可通过动态 SQL 语句来发出。 它是一个可执行语句,仅当 DYNAMICRULES 运行行为对于程序包有效时才能动态...
Se aplica a:SQL Server 2008 (10.0.x) y versiones posteriores. SQL USEMASTER;CREATECERTIFICATE <certificateName>WITHSUBJECT ='<login_name> certificate in master database', EXPIRY_DATE ='12/05/2025'; GOCREATELOGIN <login_name>FROMCERTIFICATE <certificateName>; GO ...
CREATE INDEX (U-SQL) 项目 2017/03/10 1 个参与者 本文内容 Summary Syntax Remarks See Also Summary This statement creates a clustered index with the given name on the specified table. Syntax Create_Index_Statement := 'CREATE' 'CLUSTERED' 'INDEX' Quoted_or_Unquoted_Identifier 'ON' ...
Syntax cluster_index_clause index_attributes::= table_index_clause::= bitmap_join_index_clause::= local_partitioned_index::=index_attributes::= index_expr global_partitioned_index::=,local_partitioned_index::=,index_attributes::=,domain_index_clause::=) ...