] table_or_view_name } <backward_compatible_index_option> ::= { PAD_INDEX | FILLFACTOR = fillfactor | SORT_IN_TEMPDB | IGNORE_DUP_KEY | STATISTICS_NORECOMPUTE | DROP_EXISTING } 示例: 参数: UNIQUE:为表或视图创建唯一索引。 唯一索引不允许两行具有相同的索引键值。 视图的聚集索引必须唯一。如果...
table_or_view_name 与该索引关联的表或视图的名称。 若要查看表或视图的索引详细信息,请使用 sys.indexes 目录视图。 当<database_name> 是当前数据库名称时,Azure SQL 数据库支持由三部分构成的名称 <database_name>.<schema_name>. 格式,或者 <database_name>tempdb, 以# 或##开头。 如果架构名称 dbo...
Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by setting options on the index.
VIEW DATABASE STATE或VIEW DATABASE PERFORMANCE STATE(SQL Server 2022) 許可權,使用物件通配符@object_id=NULL傳回指定資料庫內所有物件的相關信息。 VIEW SERVER STATE或VIEW SERVER PERFORMANCE STATE(SQL Server 2022) 許可權,可使用資料庫通配符@database_id=NULL傳回所有資料庫...
For more information, seeCREATE 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 level of the index in the same way table data is stored in a ...
hive sql的in hiveSQL的indexof 在hive中新建表”apache_log” CREATE TABLE apachelog ( host STRING, identity STRING, user STRING, time STRING, request STRING, status STRING, size STRING, referer STRING, agent STRING) ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.RegexSerDe'...
CREATE VIEW (Transact-SQL) CREATE WORKLOAD GROUP (Transact-SQL) CREATE XML INDEX (Transact-SQL) CREATE XML SCHEMA COLLECTION (Transact-SQL) DISABLE TRIGGER (Transact-SQL) DROP 语句 (Transact-SQL) ENABLE TRIGGER (Transact-SQL) TRUNCATE TABLE (Transact-SQL) ...
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); ##创建唯一索引 mysql>insertintostudentsvalues(1,‘eee’,0); ##插入重复数据失败 ...
CREATE VIEW (Transact-SQL) CREATE WORKLOAD GROUP (Transact-SQL) CREATE XML INDEX (Transact-SQL) CREATE XML SCHEMA COLLECTION (Transact-SQL) DISABLE TRIGGER (Transact-SQL) DROP 语句 (Transact-SQL) ENABLE TRIGGER (Transact-SQL) TRUNCATE TABLE (Transact-SQL) ...
With SQL Sentry, you can click on the Index tab to identify unused indexes in SQL Server and TSQL. You can also view SQL Server index usage metrics to more easily discover the seeks, scans, and lookups of specific indexes (low volumes of these index usage stats could indicate an unused ...