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sql create table same primary & foreign key


Yes we can.

create table partner ( partner_id INTEGER NOT NULL PRIMARY KEY)

create table personal_partner ( partner_id INTEGER NOT NULL PRIMARY KEY FOREIGN KEY REFERENCES partner(partner_id))


Categories : SQL

Related to : sql create table same primary & foreign key
Exception: "Can't perform Create, Update, or Delete operations on 'Table(Property_main_image)' because it has no primary key."
LINQ does not allow to insert data into table without primary key. To achieve the insert data with table without primary key you can either use store procedure or create a query and execute using LINQ.

Categories : C#
Yii HAS_MANY Relationship with Non Foreign Key and Non Primary Key
At first, you need to define a relationship by overriding relations() method in CountryCodes class. public function relations() { $relations = [ 'country_subdivisions' => [ CountryCodes::HAS_MANY, 'CountrySubDivision', [ 'iso2' => 'iso2' ] ] ]; // merge with parents retu

Categories : PHP
Having Two Foreign Key Constraints Reference the Same Primary Key and both use ON UPDATE CASCADE
This is when you need to start using triggers. CREATE TRIGGER tr_UpdateLikee BEFORE UPDATE ON Profile FOR EACH ROW UPDATE Likes SET likeeId = NEW.ProfileId Where LikeeId = Profile.ProfileId CREATE TRIGGER tr_UpdateLiker BEFORE UPDATE ON Profile FOR EACH ROW UPDATE Likes SET likerId = NEW.ProfileId Where LikerId = Profile.ProfileId

Categories : Mysql
How do I declare foreign keys referencing multi-value primary key in mysql?
I'll refer you here for more details: MySQL Foreign Key Error 1005 errno 150 essentially your problem is that in your Section table, you have a composite primary key PRIMARY KEY(CourseNumber, SectionNo), in your Enrolls table you then try to refer to a field SectionNo of table Section, but there is no index on that field. Any referenced field must have an index. So, make sure that any field you

Categories : Mysql
Selecting elements from a foreign table matching foreign key?
Join the table as usual, and use MySQL's CONCAT or CONCAT_WS functions to concatenate the fields, such as: SELECT h.*, CONCAT_WS(' ', e.employee_firstname, employee_lastname) as employee FROM HOURS h INNER JOIN EMPLOYEE e ON e.employee-num = h.EMPLOYEE_employee_Num

Categories : Mysql
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