Foreign Keys

Question:
How do I temporarily disable foreign keys in a table, insert more rows, and then enable them again?

In particular, I need to know about syntax and what the code would be like.

Answer:
You need to disable the mechanism that enforces integrity, the CONSTRAINT against the column housing the foreign key. You do this by using the ALTER TABLE command like this:

ALTER TABLE MyTable DROP CONSTRAINT MyConstraintName

To re-enable the constraint after the operation, ALTER the table again. The particular syntax depends on what you are trying to re-establish; it’s different for PRIMARY KEY, FOREIGN KEY, and DEFAULT&#151not to mention the different flavors of indexes, etc.

Take a look in Books On Line for examples of the particular constraint need.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may

man on floor with data

DevX Quick Guide to Data Ingestion

One of the biggest trends of the 21st century is the massive surge in internet usage. With major innovations such as smart technology, social media, and online shopping sites, the internet has become an essential part of everyday life for a large portion of the population. Due to this internet

payment via phone

7 Ways Technology Has Changed Traditional Payments

In today’s digital world, technology has changed how we make payments. From contactless cards to mobile wallets, it’s now easier to pay for goods and services without carrying cash or using a checkbook. This article will look at seven of the most significant ways technology has transformed traditional payment methods.