ALTER TABLE では、列と制約を変更、追加、または削除して、テーブルの定義を変更します。 また、ALTER TABLE では、パーティションを再割り当ておよび再構築したり、制約とトリガーを無効化および有効化したりもします。
Example ALTERTABLECustomers DROPCOLUMNEmail; ALTER TABLE - RENAME COLUMN To rename a column in a table, use the following syntax: ALTERTABLEtable_name RENAMECOLUMNold_nametonew_name; To rename a column in a table in SQL Server, use the following syntax: ...
We can also drop (remove) columns in a table using theALTER TABLEcommand with theDROPclause. For example, -- delete country column from Customers tableALTERTABLECustomersDROPCOLUMNcountry; Run Code Here, the SQL command removes thecountrycolumn from theCustomerstable. Rename a Table We can change...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL database in Microsoft Fabric Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by ...
For ON DELETE or ON UPDATE, if the CASCADE option is specified, the row is updated in the referencing table if the corresponding referenced row is updated in the parent table. If NO ACTION is specified, SQL Server Compact Edition returns an error, and the update action on the referenced ro...
table_or_view_name 這是與索引相關聯的資料表或檢視表的名稱。 若要檢視數據表或檢視表的索引詳細數據,請使用 sys.indexes 目錄檢視。 當<database_name> 為目前資料庫名稱時,Azure SQL Database 支援三部分名稱格式 <database_name>.<schema_name>.<object_name>,或 <database_name> 是tempdb,且 <object...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL database in Microsoft Fabric Modifies an existing table or view index (rowstore, columnstore, or XML) by disabling, rebuilding, or reorganizing the index; or by ...
TABLE table_constraint 触发器 USER VIEW WORKLOAD GROUP XML SCHEMA COLLECTION 备份和还原 CREATE 排序规则 DROP 权限 服务代理 SET xQuery 下载PDF 使用英语阅读 保存 添加到集合 添加到计划 通过 Facebookx.com 共享LinkedIn电子邮件 打印 ALTER SERVER CONFIGURATION (Transact-SQL) ...
If you are not the owner of the table, you need the DROP ANY TABLE privilege in order to use the drop_table_partition or truncate_table_partition clause. You must also have space quota in the tablespace in which space is to be acquired in order to use the add_table_partition, modify_...
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>.<object_name> 格式,或者 <database_name>tempdb,<object_name> 以# 或...