NONCLUSTERED是CREATE INDEX语句的默认值。index_name:指定索引的名称。索引名称在数据表或视图中必须唯一,但在数据库中不必唯一。 ON{table|view}:指定索引所属的数据表或视图。 column:指定索引基于的一个字段或多个字段(即一列或多列)。指定两个或多个列名,可为指定字段的组合值创建组合索引。{table|view}后的...
CREATE INDEX index_name ON table_name (column_name,column_name) 34:视图 一:创建视图 CREATE VIEW 视图名 AS SELECT 列名 FROM 表名 WHERE 条件 二:查询视图 select * from 视图名 三:删除视图 DROP VIEW 视图名 35:存储过程:是一组预编译的T-SQL语句 一:执行常用的系统存储过程 EXEC sp_databases -...
You can define the trigger to fire for specific DDL events such as CREATE_TABLE, DROP_TABLE, ALTER_TABLE, CREATE_VIEW, and so on, or you can specify DDL_DATABASE_LEVEL_EVENTS if you want the trigger to fire for all DDL events in the database. Within the trigger you can invoke the ...
如果指定了 GROUP BY,则 GROUPING 只能用在 SELECT列表、HAVING 和 ORDER BY 子句中。-- 语法 GROUPING ( <column_expression> )3.4.4.2 GROUPING_ID() 计算分组级别的函数。仅当指定了 GROUP BY 时,GROUPING_ID 才能在 SELECT列表、HAVING 或 ORDER BY 子句中使用。 代码语言:javascript 复制 --语法GROUPING_...
Create a query to remove last two characters of a string Create a view and change the data types of some variables Create a writable view in SQL DB create an index on just the date part of a datetime field Create Database Failed - Primary file must be at least 3 MB ... create dynam...
CreateTableStatement CreateTriggerStatement CreateTypeStatement CreateTypeTableStatement CreateTypeUddtStatement CreateTypeUdtStatement CreateUserStatement CreateViewStatement CreateWorkloadClassifierStatement CreateWorkloadGroupStatement CreateXmlIndexStatement
CREATE FULLTEXT INDEX ON table_name [ ( { column_name [ TYPE COLUMN type_column_name ] [ LANGUAGE language_term ] [ STATISTICAL_SEMANTICS ] } [ , ...n ] ) ] KEY INDEX index_name [ ON <catalog_filegroup_option> ] [ WITH ( <with_option> [ , ...n ] ) ] [...
Clustered columnstore index: Data Load Optimization - Parallel Bulk Import Features of In-Memory OLTP Let's look at the main features of In-Memory OLTP. Memory-optimized tables The T-SQL keyword MEMORY_OPTIMIZED, on the CREATE TABLE statement, is how a table is created to exist in active me...
CreateSymmetricKeyStatement CreateSynonymStatement CreateTableStatement CreateTriggerStatement CreateTypeStatement CreateTypeTableStatement CreateTypeUddtStatement CreateTypeUdtStatement CreateUserStatement CreateViewStatement CreateWorkloadClassifierStatement CreateWorkloadGroupStatement CreateXmlIndexStatement CreateXmlSchema...
[ [ , ] INDEX ( index_val [ ,...n ] ) ] } ::= { table_or_view_name [ [ AS ] table_alias ] [ <tablesample_clause> ] [ WITH ( table_hint [ [ , ]...n ] ) ] | rowset_function [ [ AS ] table_alias ] [ ( bulk_column...