What is SQL Server? Connect to the Database Engine What's new? Editions and features Release notes Business continuity Database design Development Internals & architecture Installation Migrate & load data Manage, monitor, & tune Query data Reporting & Analytics Security Tools Tutorials SQL Server on...
What is SQL Server? Connect to the Database Engine What's new? Editions and features Release notes Business continuity Database design Development Internals & architecture Installation Migrate & load data Manage, monitor, & tune Query data Reporting & Analytics Security Tools Tutorials SQL Server on...
SQL Server Management Studio can reuse connection information when opening multiple connections to Object Explorer and Query Editor windows. Close all connections to force reconnection. HASHED Applies to SQL Server logins only. Specifies that the password entered after the PASSWORD argument is already ...
( <FILESTREAM_option> ) | <HADR_options> | <mixed_page_allocation_option> | <parameterization_option> | <query_store_options> | <recovery_option> | <remote_data_archive_option> | <persistent_log_buffer_option> | <service_broker_option> | <snapshot_option> | <sql_option> | <...
在查询级别,使用USE HINT 'ENABLE_QUERY_OPTIMIZER_HOTFIXES'查询存储提示功能进行无代码更改。 之后,发布 SQL Server 2017 (14.x) 时,为使用 SQL Server 2017 (14.x) 默认兼容性级别 (140) 的数据库自动启用了在 SQL Server 2016 (13.x) RTM 之后发布的所有查询优化器修补程序。 这是一种累积行为,还会包...
<external_access_option>|<FILESTREAM_options>|<HADR_options>|<parameterization_option>|<query_store_options>|<recovery_option>|<service_broker_option>|<snapshot_option>|<sql_option>|<termination>|<temporal_history_retention>|<data_retention_policy>|<compatibility_level>{160|150|140|130|120|110|...
Važno Disabling automatic recomputation of distribution statistics may prevent the Query Optimizer from picking optimal execution plans for queries that involve the table.STATISTICS_INCREMENTAL = { ON | OFF }Applies to: SQL Server (Starting with SQL Server 2014 (12.x)) and Azure SQL Database...
在查询级别,通过修改查询使用USE HINT 'ENABLE_QUERY_OPTIMIZER_HOTFIXES'查询提示。 在查询级别,在不更改代码的情况下,使用USE HINT 'ENABLE_QUERY_OPTIMIZER_HOTFIXES'并使用查询存储提示(预览版)功能。 之后,发布 SQL Server 2017 (14.x) 时,为使用 SQL Server 2017 (14.x) 默认兼容性级别 (140) 的数据库自...
setup_consumers SET ENABLED = 'YES' WHERE NAME LIKE '%stages%'; Query OK, 3 rows affected (0.00 sec) Rows matched: 3 Changed: 3 Warnings: 0 运行alter table 操作。在此示例中,将 middle_name 列添加到 employee 示例数据库的 employee 表中。 代码语言:javascript 代码运行次数:0 运行 AI代码...
mysql>ALTERTABLEsbtest1ADDCOLUMNc4int(10),ADDCOLUMNc5int(10),ALGORITHM=INSTANT;QueryOK,0rows affected,2warnings(0.10sec)Records:0Duplicates:0Warnings:2mysql>alter table sbtest1DROPCOLUMNc4,DROPCOLUMNc5,ALGORITHM=INSTANT;QueryOK,0rowsaffected(0.09sec)Records:0Duplicates:0Warnings:0 ...