错误1452 MySQL [英] Error 1452 MySQL
问题描述
插入数据到一个空表,但得到了错误1452.我不知道为什么MySQL在错误中提到NameInfo表。
$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ NULL,
标准VARCHAR(13)NOT NULL,
名称VARCHAR(13)NOT NULL,
Name_ID INT(4)NOT NULL,
Place_ID INT(9)NOT NULL,
Supplier_ID INT(4)NOT NULL,
Date_Supplied DATE NOT NULL,
PRIMARY KEY(Name_ID),
FOREIGN KEY(Supplier_ID)REFERENCES Supplier(Supplier_ID),
FOREIGN KEY(Place_ID)参考地方(Place_ID)
);
CREATE TABLE部门(
Dept_ID INT(6)NOT NULL,
Dept_NAME VARCHAR(25)NOT NULL,
DeptHead_ID INT(6)NOT NULL,
DeptAA VARCHAR(20)NOT NULL,
ParentDept_ID INT(4)NOT NULL,
位置VARCHAR(10)NOT NULL,
DeptType VARCHAR(12)NOT NULL,
主键(Dept_ID)
);
CREATE TABLE Employee(
Emp_ID INT(6)NOT NULL,
Name VARCHAR(15)NOT NULL,
Dept_ID INT(6)NOT NULL,
Tax_ID INT(4)NOT NULL,
国家VARCAR(15)NOT NULL,
Hire_Date DATE NOT NULL,
Birth_Date DATE NOT NULL,
薪水INT(6)NOT NULL,
Bonus INT(6)NOT NULL,
AddressInfo VARCHAR(30)NOT NULL,
PRIMARY KEY(Emp_ID),
FOREIGN KEY(Dept_ID)REFERENCES Departments(Dept_ID)
);
将数据插入父表Departments中的子表之前Employee。
$ b $ (040124,'人力资源部门',405802,'Mohammed Siddiqui',1001,'California','HR','bpre $
插入部门
' );
INSERT INTO Employee
VALUES(901126,'Kenneth Tran',040126,3013,'美国',06/01 / 2013,06 / 01 / 1992,80430,500' N. 2nd St. Santa Clara,CA.');
错误1452(23000):无法添加或更新子项:外键约束失败('namesinc'_'employee',CONSTRAINT'employee-ibfk_1'FOREIGN KEY('Dept_ID')REFERENCES' DEPARTMENTS'('DEPT_ID'))
请让我知道我是否可以提供更多信息。
错误1452表示插入失败,因为外键约束无法兑现。
您的查询将数据插入 Employee
表中,该表的外键约束引用 Departments
表。如果您没有设置 Department
条目,则 Employeee
行指向插入将失败。
您需要首先插入 Departments
条目,或者您的 Employee
insertions将会失败。
Inserting data into an empty table, but got error 1452. I am not sure why MySQL mentions the NameInfo table within the error.
CREATE TABLE NameInfo (
Language VARCHAR(7) NOT NULL,
Status VARCHAR(13) NOT NULL,
Standard VARCHAR(13) NOT NULL,
Name VARCHAR(13) NOT NULL,
Name_ID INT(4) NOT NULL,
Place_ID INT(9) NOT NULL,
Supplier_ID INT(4) NOT NULL,
Date_Supplied DATE NOT NULL,
PRIMARY KEY (Name_ID),
FOREIGN KEY (Supplier_ID) REFERENCES Supplier(Supplier_ID),
FOREIGN KEY (Place_ID) REFERENCES Place(Place_ID)
);
CREATE TABLE Departments (
Dept_ID INT(6) NOT NULL,
Dept_NAME VARCHAR(25) NOT NULL,
DeptHead_ID INT(6) NOT NULL,
DeptAA VARCHAR(20) NOT NULL,
ParentDept_ID INT(4) NOT NULL,
Location VARCHAR(10) NOT NULL,
DeptType VARCHAR(12) NOT NULL,
Primary key (Dept_ID)
);
CREATE TABLE Employee (
Emp_ID INT(6) NOT NULL,
Name VARCHAR(15) NOT NULL,
Dept_ID INT(6) NOT NULL,
Tax_ID INT(4) NOT NULL,
Country VARCAR(15) NOT NULL,
Hire_Date DATE NOT NULL,
Birth_Date DATE NOT NULL,
Salary INT(6) NOT NULL,
Bonus INT(6) NOT NULL,
AddressInfo VARCHAR(30) NOT NULL,
PRIMARY KEY(Emp_ID),
FOREIGN KEY(Dept_ID) REFERENCES Departments(Dept_ID)
);
Inserted data to parent table, Departments, before child table, Employee.
INSERT INTO Departments
VALUES (040124,'Human Resource Division',405802,'Mohammed Siddiqui',1001,'California','HR');
INSERT INTO Employee
VALUES (901126,'Kenneth Tran',040126,3013,'United States',06/01/2013,06/01/1992,80430,500,'N. 2nd St. Santa Clara, CA.');
ERROR 1452 (23000): Cannot add or update a child: a foreign key constraint fails ('namesinc'_'employee', CONSTRAINT 'employee-ibfk_1 'FOREIGN KEY ('Dept_ID') REFERENCES 'DEPARTMENTS' ('DEPT_ID'))
Please let me know if I can provide additional information.
Error 1452 indicates an insertion failed because a foreign key constraint couldn't be honoured.
Your query is inserting data into the Employee
table, which has a foreign key constraint referring to the Departments
table. If you haven't got a Department
entry set up that the Employeee
row refers to the insertion will fail.
You need to insert the Departments
entries first, or your Employee
insertions will fail this test.
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