Antidiuretic hormone (ADH, vasopressin) is produced by the supraoptic and paraventricular nuclei of the hypothalamus and travels in the axons through the pituitary stalk to the posterior pituitary gland.
What is a foreign key in SQL Server? A foreign key is a way to enforce referential integrity within your SQL Server database. A foreign key means that values in one table must also appear in another table. The referenced table is called the parent table while the table with the foreign key is called the child table.
24562. 1. Note that the P_Id column in the Orders table points to the P_Id column in the Persons table. The P_Id column in the Persons table is the PRIMARY KEY in the Persons table. The P_Id column in the Orders table is a FOREIGN KEY in the Orders table.The FOREIGN KEY constraint is used to prevent actions that would destroy links between tables.The FOREIGN KEY constraint also prevents invalid data from being inserted into the foreign key column, because it has to be one of the values contained in the table it points to.QL FOREIGN KEY Constraint on ALTER TABLE. To 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.