sql数据库删除表的外键约束(INSERT 语句与 FOREIGN KEY 约束"XXX"冲突。该冲突发生于数据库"XXX",表"XXX", column 'XXX) 使用如下SQL语句查询出表中外键约束名称: 1selectname2from sys.foreign_key_columns fjoin sys.objects oon f.constraint_object_id=o.object_id3where f.parent_object_id=object_id('...
你student表中sno，和sc中sno的值不一样，估计你是写错了。例如 student sno 200215121 ;而 sc中sno是20025121,估计你2002后面少写了个1.所以违反了参照完整性。
Below we show examples of how to specify the foreign key when creating theORDERStable: MySQL: CREATE TABLE ORDERS (Order_ID integer, Order_Date date, Customer_SID integer, Amount double, Primary Key (Order_ID), Foreign Key (Customer_SID) REFERENCES CUSTOMER(SID)); ...
Note:In case we could execute this INSERT statement, we would insert a city belonging to a country with id = 6, without actually knowing that country. Later, someone could insert e.g. the Netherlands as the country with id = 6 and we would have inconsistent data When we delete data fro...
If <dml_table_source> is specified, the target of the outer INSERT statement must meet the following restrictions: It must be a base table, not a view. It cannot be a remote table. It cannot have any triggers defined on it. It cannot participate in any primary key-foreign key ...
具有INSTEAD OF触发器的表不能同时具有指定级联操作的REFERENCES子句。 但是,级联操作目标表的AFTER触发器可对另一个表或视图执行INSERT、UPDATE或DELETE语句,这将激发为该对象定义的INSTEAD OF触发器。 反馈 此页面是否有帮助? 是否 提供产品反馈| 在Microsoft Q&A 获取帮助 ...
You can insert values in user-defined type columns by: Supplying a value of the user-defined type. Supplying a value in a SQL Server system data type, as long as the user-defined type supports implicit or explicit conversion from that type. The following example shows how to insert a valu...
##TempTable and INSERT-SELECT FROM an existing Table with an IDENTITY column %rowtype equivalent in SQL server ++ operator in TSQL - bug or feature? 2 tables referencing each other using foreign key.is it possible 2 transactions in one stored procedure 4 digit number to add to table 8 KB...
--The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Employees_Companies". --The conflict occurred in database "HRDatabase", table "dbo.Companies", column 'ID'. --The statement has been terminated. We will add the company and try the employee insert again. ...
指定在批量导入操作期间,必须检查所有对目标表或视图的约束。 若没有 CHECK_CONSTRAINTS 选项,则忽略所有 CHECK 和 FOREIGN KEY 约束,并在该操作后将表的约束标记为不可信。 始终强制使用 UNIQUE 和 PRIMARY KEY 约束。 导入使用 NOT NULL 约束定义的字符列时,当文本文件中没有值时,BULK INSERT 插入一个空白字符...