”失败,错误如下:“无法截断表'dsc100552_db.dbo.ALV_SalesBigClass',因为该表正由 FOREIGN KEY 约束引用。”。失败的原因可能有: 查询本身有问题、未正确设置"ResultSet"属性、未正确设置参数或未正确建立连接。 MSSQL导入数据时,出现这错误的原因是在导入时选择了“删除目标表中的数据”,因为有外键约束,无法删...
After the data was inserted we create a foreign key (FK) between the two tables. To make this example work we used the NOCHECK option when we created the FK. This will allow us to create the foreign key even if there are foreign key violations. Here is the T-SQL example script. CREA...
An index on the foreign key columns enables the Database Engine to quickly find related data in the foreign key table. SQL Server 2022 (16.x) introduces resumable operations for adding table constraints for primary key and unique key constraints. For more information on enabling and using ...
SQL USEAdventureWorks2022; GOSELECTf.nameASforeign_key_name, OBJECT_NAME(f.parent_object_id)AStable_name, COL_NAME(fc.parent_object_id, fc.parent_column_id)ASconstraint_column_name, OBJECT_NAME(f.referenced_object_id)ASreferenced_object, COL_NAME(fc.referenced_object_id, fc.referenced_column...
SQL Server 配置管理器 SQLCMD SSB 诊断 SQL Server Data Tools (SSDT) SQL Server Management Studio (SSMS) SQL 项目 SqlPackage SQL Server Profiler Visual Studio 本机帮助程序 扩展功能 Visual Studio Code 扩展 MSSQL 扩展 概述 连接和查询 Azure Functions 的 SQL 绑定 ...
AStringvalue that specifies the primary key referenced by the foreign key. 範例 建立、改變和移除外部索引鍵 請參閱 參考 ForeignKey類別 ForeignKey 成員 Microsoft.SqlServer.Management.Smo 命名空間 其他資源 建立與修改 FOREIGN KEY 條件約束 CREATE TABLE (Transact-SQL)...
can not restore .bak file on sql server 2012 can not truncate table because foreign key reference can one sql agent start two tasks in parallel? Can we create synonyms for database name Can we execute stored procedure with data_writer permission. Can we include both BAK and TRN file in ...
How to create a SQL Server foreign key SQL FOREIGN KEY Constraint With the definition of the tables as created in the above section, we will make the following change to add a foreign key constraint and add a new employee. --Now, let's enforce the integrity of the data by adding foreig...
例如,可以对 Order_Details 表的ProductID 列设置一个 FOREIGN KEY 约束,以确保该列中的输入值与 Products 表的ProductID 列中的现有值匹配。 展开表 注意 如果表是为复制发布的,则必须使用 ALTER TABLETransact-SQL 语句或 SQL Server 管理对象 (SMO) 来更改架构。使用表设计器或数据库关系图设计器更改架构...
SQL Server 对一个表可以包含的 FOREIGN KEY 约束(引用其他表)数没有预定义限制,对引用特定表的其他表所拥有的 FOREIGN KEY 约束数也没有预定义的限制。但是,实际的 FOREIGN KEY 约束数会受到硬件配置以及数据库和应用程序的设计的限制。建议表中包含的 FOREIGN KEY 约束不要超过 253 个,并且引用该表的 FOREIGN...