SQL 46) -ADD CONSTRAINT FOREIGN KEY 创建外键约束 在audit表上创建外键约束,其emp_no对应employees_test表的主键id http://www.nowcoder.com/questionTerminal/aeaa116185f24f209ca4fa40e226de48 方法)创建外键 ALTER TABLE audit ADD CONSTRAINT FOREIGN KEY (emp_no) REFERENCES employees_test(id); 创建外...
SQL FOREIGN KEY on ALTER TABLE To create aFOREIGN KEYconstraint on the "PersonID" column when the "Orders" table is already created, use the following SQL: MySQL / SQL Server / Oracle / MS Access: ALTERTABLEOrders ADDFOREIGNKEY(PersonID)REFERENCESPersons(PersonID); ...
queryRunner.update("SET FOREIGN_KEY_CHECKS = 0;"); queryRunner.update(sql, pid); queryRunner.update("SET FOREIGN_KEY_CHECKS = 1;"); SQL语句 出现外键约束无法删除时候 添加首位两句话临时解除外键检查
ERROR 1215 (HY000): Cannot add foreign key constraint 最近在建表时遇到了这个错误,然后找了下找到了解决办法,记录下: 本来是要建两张表: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 createtabledepartment( idint, namevarchar(20) ); createtableemployee( idintprimarykeyauto_increment, namevarchar(20...
create table p1 (i1 int not null primary key, i2 int, i3 int); create table c11 (i1 int not null primary key, i2 int); create table c12 (i1 int not null primary key, i2 int); alter table p1 add constraint fkp1 foreign key (i2, i3) references gp; ...
先保证你的数据库有roles这张表
Here, the query is successfully sql-executed as the rows we are trying to insert in theOrderstable have valid values in thecustomer_idcolumn, which has aFOREIGN KEYconstraint in theCustomerstable. Insertion Failure in Foreign Key An insertion failure occurs when a value is entered into a table...
SQL复制 ALTERTABLESales.TempSalesReasonADDCONSTRAINTFK_TempSales_SalesReasonFOREIGNKEY(TempID)REFERENCESSales.SalesReason (SalesReasonID)ONDELETECASCADEONUPDATECASCADE; 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
ERROR 1215 (HY000): Cannot add foreign key constraint 在用laravel建表时遇到了这个错误,然后找了下找到了解决办法,记录下: 是要建两张表: Schema::create('users',function(Blueprint$table){$table->bigIncrements('id');$table->string('name');$table->string('email')->unique();$table->timestam...
SQL FOREIGN KEY Constraint on ALTER TABLETo create a FOREIGN KEY constraint on the "P_Id" column when the "Orders" table is already created, use the following SQL:MySQL / SQL Server / Oracle / MS Access:ALTER TABLE Orders ADD FOREIGN KEY (P_Id) REFERENCES Persons(P_Id)...