Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed InstanceYou can define a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL. Creating a primary key automatically creates a corresponding unique clustered index, or a nonclustered ...
Azure SQL Managed Instance You can define a primary key in the SQL Server Database Engine by using SQL Server Management Studio or Transact-SQL. Creating a primary key automatically creates a corresponding unique clustered index. However, your primary key can be specified as a nonclustered index...
Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed InstanceYou can delete (drop) a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL.When the primary key is deleted, the corresponding index is deleted. This may be the ...
后面生成的SQL语句,也都应用此政策(policy),一方面是没有解决SQL语句太长的问题,另一方面,从效率上来说,直接在SQL Server Management Studio中运行SQL语句的效率是最好的。 2 Drop Key Index 依据数据库中的所有表删除所有的Index,生成它如下的例子语句 DROP INDEX [PRCALW_INDEX2] ON [dbo].[WorkCentreCalendar...
You can delete (drop) a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL. When the primary key is deleted, the corresponding index is deleted. This may be the clustered index of the table, causing the table to become a heap. For more information, seeHeaps...
You can delete (drop) a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL. When the primary key is deleted, the corresponding index is deleted. This may be the clustered index of the table, causing the table to become a heap. For more information, seeHeaps...
Azure SQL Managed Instance You can modify a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL. You can modify the primary key of a table by changing the column order, index name, clustered option, or fill factor. ...
这可以通过SQL Server Management Studio (SSMS) 或其他数据库管理工具来完成。确保主键约束已正确应用于所需的列,并且没有意外的数据损坏或配置错误。 总之,处理违反Primary Key约束的问题通常涉及检查现有数据、确保新数据的唯一性,并正确地重新执行SQL操作。如果问题持续存在,可能需要进一步检查数据库的完整性和配置。
因为你插入一列。看列是否允许重复。或表中存在重复行。有垃圾数据。仔细查查表中的数据，清除重复行即可。select * from 表名 where 列名 in (select 列名 from 表名 group by 列名 having count(*)>1)表名：不用解释了吧。列名：因为我不知道你SQL中列的键值。所以你就慢慢试吧。查出来后...
Also, if any of the foreign keys are defined in foreign key constraints, which we’ll learn in the following section, then those columns have FK after them. These are circled in green in the above diagram. Foreign Key Constraints Some database management systems, such as SQL Server allow ...