);-- create indexCREATEINDEXcollege_indexONColleges(college_code); 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, colu...
In SQL Server CREATE INDEX command creates a relational index on a table or view. Also called a rowstore index because it is either a clustered or nonclustered btree index. You can create a rowstore index before there is data in the table. Use a rowstore index to improve query performance,...
CREATE INDEX ExampleThe SQL statement below creates an index named "idx_lastname" on the "LastName" column in the "Persons" table:CREATE INDEX idx_lastname ON Persons (LastName); If you want to create an index on a combination of columns, you can list the column names within the ...
CREATE INDEXStatement will look like this: CREATE[UNIQUE]INDEX[INDEX NAME] ON TABLE[COLUMN NAME] EXAMPLE : Want to create aINDEXon TableUserswhich is including column namesuser_fnameanduser_lname. SQL Statement: CREATE INDEXuser_name ONUsers (user_fname, user_lname)...
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...
Starting with SQL Server 2012 (11.x) and Azure SQL Database, if any one of the specified non-key columns are varchar(max), nvarchar(max), or varbinary(max) data types, the index can be built or rebuilt using the ONLINE option.
To delete an index, you use theDROP INDEXstatement: DROPINDEXindex_name;Code language:SQL (Structured Query Language)(sql) For example, the following statement drops themembers_last_name_iindex: DROPINDEXmembers_last_name_i;Code language:SQL (Structured Query Language)(sql) ...
Create an indexed view: a T-SQL example The following example creates a view and an index on that view, in theAdventureWorksdatabase. SQLCopy --Set the options to support indexed views.SETNUMERIC_ROUNDABORTOFF;SETANSI_PADDING, ANSI_WARNINGS, CONCAT_NULL_YIELDS_NULL, ARITHABORT, QUOTED_IDENTIFIE...
Create an indexed view: a T-SQL example The following example creates a view and an index on that view, in theAdventureWorksdatabase. SQLCopy --Set the options to support indexed views.SETNUMERIC_ROUNDABORTOFF;SETANSI_PADDING, ANSI_WARNINGS, CONCAT_NULL_YIELDS_NULL, ARITHABORT, QUOTED_IDENTIFIE...
CREATE [ UNIQUE ] [ CLUSTERED | NONCLUSTERED ] INDEX index_name ON (column [ ASC | DESC ] [ ,...n ] ) [ INCLUDE (column_name [ ,...n ] ) ] [ WHERE <filter_predicate> ] [ WITH ( <relational_index_option> [ ,...n ] ) ] [ ON {...