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.
A foreign key places constraints on data in the related tables, which enables MySQL to maintain referential integrity. Letâs take a look at the following database diagram in the sample database. We have two tables: customers and orders. Each customer has zero or more orders and each order belongs to only one customer.ySQL drop foreign key. You also use the ALTER TABLE statement to drop foreign key as the following statement: 1. 2. ALTER TABLE table_name. DROP FOREIGN KEY constraint_name. In the statement above: 1  First, you specify the table name from which you want to remove the foreign key.