constraint fails”,于是尝试将freshstudententities...“1217 – Cannot delete or update a parent row: a foreign key constraint fails“,这可能是MySQL在引擎中设置了foreign...可以通过设置FOREIGN_KEY_CHECKS变量来避免这种情况: SET FOREIGN_KEY_CHECKS = 0; 删除完成后设置 :SET FOREIGN_KEY_CHECKS = 1...
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
错误代码 java.sql.SQLException: Cannot add or update a child row: a foreign key constraint fails (book.t_order_item, CONSTRAINTt_order_item_ibfk_1FOREIGN KEY (order_id) REFERENCESt_order(order_id)) Query: insert into t_order_item(name,count,price,total_price,order_id)values(?,?,?,?,...
SQL中约束问题的缺失索引EN外键约束 foreign key 外键约束的要求： 父表和字表必须使用相同的存储引擎...
PRIMARYKEY(OrderID), FOREIGNKEY(PersonID)REFERENCESPersons(PersonID) ); SQL Server / Oracle / MS Access: CREATETABLEOrders ( OrderID intNOTNULLPRIMARYKEY, OrderNumber intNOTNULL, PersonID intFOREIGNKEYREFERENCESPersons(PersonID) ); To allow naming of aFOREIGN KEYconstraint, and for defining aFOR...
Here, the SQL command creates two foreign keys (buyerandseller) in theTransactionstable. Note:As with other constraints, naming aFOREIGN KEYconstraint usingCONSTRAINT constraint_nameis optional. But doing so makes it easier to make changes to or delete the constraint. This is especially helpful wh...
Caused by: java.sql.BatchUpdateException: Cannot delete or update a parent row: a foreign key constraint fails (`eportal3/employee_passport`, CONSTRAINT `FKF2967A831229D0E0` FOREIGN KEY (`employee_id`) REFERENCES `employee` (`employee_id`)) at com.mysql.jdbc.ServerPreparedStatement.execut...
mysql数据库报错 sql 1452 Cannot add or update a child row:a foreign key constraint fails,其实这句话的意思就是你添加一个值是一个外键
报错:failed to import foreign schema from odps:Table not found -xxx 问题原因:查询的表在MaxCompute中不存在。 解决方法:前往MaxCompute确认表是否存在。 ERRCODE_UNIQUE_VIOLATION或者pk violates 报错:Update row with Key (id)=(xxxx) multiple times或者duplicate key value violates unique constraint ...
2.7 sql删除外键报错:1091 - Can't DROP 'course_id'; check that column/key exists 2.8 sql添加主键时报错1138 - Invalid use of NULL value 2.9 sql报错:1822 - Failed to add the foreign key constraint. Missing index for constraint 'student_ibfk_2' in the referenced table 'login' ...