使用SQL Server Management Studio 使用TRANSACT-SQL 適用於: Microsoft Fabric 中的 SQL Server Azure SQL 資料庫 Azure SQL 受控執行個體 SQL 資料庫 此主題說明如何使用 SQL Server Management Studio 或 Transact-SQL,在 SQL Server 中修改索引的屬性。
AlterServerConfigurationStatement AlterServerRoleStatement AlterServiceMasterKeyOption AlterServiceMasterKeyStatement AlterServiceStatement AlterSymmetricKeyStatement AlterTableAddTableElementStatement AlterTableAlterColumnOption AlterTableAlterColumnStatement AlterTableAlterIndexStatement AlterTableAlterPa...
Server: Msg 2601, Level 14, State 1, Line 1 Cannot insert duplicate key row in object 'UnitMeasure' with unique index 'AK_UnitMeasure_Name'. The statement has been terminated. F. 使用 IGNORE_DUP_KEY 选项以下示例首先在该选项设置为 IGNORE_DUP_KEY 时在临时表中插入多行,然后在该选项设置为...
IGNORE_CONSTRAINTS 仅在BULK选项与OPENROWSET一起使用时,才适用于INSERT语句。 指定大容量导入操作忽略表上的任何约束。 默认情况下,INSERT检查唯一约束和检查约束和主键和外键约束。 为批量导入操作指定IGNORE_CONSTRAINTS时,INSERT必须忽略目标表上的这些约束。 不能禁用UNIQUE、PRIMARY KEY或NOT NULL约束。
A SQL Server clustered index is created by default for a primary key. A nonclustered index can also be requested. The Oracle index can be removed by either dropping or disabling the constraint, whereas the SQL Server index can be removed only by dropping the constraint....
A. It must be UNIQUE to allow easy lookup of records in the view by key value during indexed view maintenance, and to prevent creation of views with duplicates, which would require special logic to maintain. It must be clustered because only a clustered index can enforce uniqueness and store...
Formula for replacing ENTER Key inside a string From Excel to SQL Server Database getting errors! FTP Connection Cannot Be Established FTP Connection Manager - The password was not allowed FTP Send File Error "The remote server returned an error: (550) File unavailable (e.g., file not found...
Server Explorer not only reveals the tables, views, and stored procedures; it also shows the fields, and primary and foreign keys of the tables. Figure 11 shows an example of a Server Explorer window. Figure 11: Server Explorer Working with Query and Report Parameters Report parameters allow ...
MySQL的复制功能是基于数据库Server层实现的,所以无论InnoDB引擎、MyISAM引擎或其他引擎都可进行同步复制。 复制过程 MySQL的复制是通过binlog功能实现的,具体分为3个线程。 主节点:dump 线程,负责采集 binlog 数据与同步库 IO 线程交互。 从节点:IO 线程将获取到的数据转储成 relaylog 文件(relaylog内部存储的内容...
Records: 4 Duplicates: 0 Warnings: 0 mysql>5、模拟主从表结构不一致,在58:3309中,在t_diff中删除d列mysql> alter table t_diff drop column d; Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> 6、在70:3309中,往t_diff中更新一条记录,并且查看表中数据mysql...