SQL Server 外键约束测试路径 下面是一个简单的单元测试代码块示例: -- 禁用外键约束,执行插入,然后启用约束的测试代码BEGINTRYEXECsp_executesql N'ALTER TABLE UserOrders NOCHECK CONSTRAINT FK_UserOrders_Users';-- 执行批量插入INSERTINTOUserOrders(UserID,OrderID
Use SQL Server Management StudioTo disable a foreign key constraint for replicationIn Object Explorer, expand the table with the foreign key constraint you want to modify, and then expand the Keys folder. Right-click the foreign key constraint and then select Modify. In the Foreign Key ...
Use SQL Server Management Studio Use Transact-SQL Next steps Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL database in Microsoft Fabric You can disable a foreign key constraint during INS...
Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)You can disable a foreign key constraint during INSERT and UPDATE transactions in SQL Server by using SQL Server Management Studio or ...
alter table 表名 add constraint 主键名 primary key(字段名1,字段名2……) 1. 2. 3. 4. 2、Foreign Key约束 外键约束是用来加强两个表(主表和从表)的一列或多列数据之间的连接的。创建外键约束的顺序是先定义主表的主键,然后定义从表的外键。也就是说只有主表的主键才能被从表用来作为外键使用,被约束...
在脚本的ALTER TABLE ... ADD CONSTRAINT部分,修改新的外键约束并指定 NOT FOR REPLICATION 选项。 例如: SQL ALTERTABLE[Sales].[SalesTerritoryHistory]DROPCONSTRAINT[FK_SalesTerritoryHistory_SalesPerson_BusinessEntityID]GOALTERTABLE[Sales].[SalesTerritoryHistory]WITHCHECKADDCONSTRAINT[FK_SalesTerrit...
MySQL / SQL Server / Oracle / MS Access: ALTERTABLEOrdersADDFOREIGNKEY(P_Id)REFERENCESPersons(P_Id) 如需命名 FOREIGN KEY 约束,并定义多个列的 FOREIGN KEY 约束,请使用下面的 SQL 语法: MySQL / SQL Server / Oracle / MS Access: ALTERTABLE表名ADDCONSTRAINT外键约束名FOREIGNKEY(column1, column2,....
SQL Server / Oracle / MS Access: CREATETABLEOrders ( OrderID intNOTNULLPRIMARYKEY, OrderNumber intNOTNULL, PersonID intFOREIGNKEYREFERENCESPersons(PersonID) ); To allow naming of aFOREIGN KEYconstraint, and for defining aFOREIGN KEYconstraint on multiple columns, use the following SQL syntax: ...
字段定义constraint 约束名约否类型(字段名)-->unique,primarykey,check字段定义constraint 约否名foreingnkey(字段名)references表名(字段名)--->foreign三、建表时约束定义1.定义各种不同的约束--创建一个用于作外键的表tb_deptSQL>CREATETABLEtb_dept ...
禁用唯一索引时,还将禁用PRIMARY KEY约束或UNIQUE约束及引用其他表中的索引列的所有FOREIGN KEY约束。 禁用聚集索引时,还将禁用基础表的所有传入和传出的FOREIGN KEY约束。 索引处于禁用状态时,会在警告消息中列出约束名称。 重新生成索引后,必须使用ALTER TABLE CHECK CONSTRAINT语句手动启用所有约束。