List of foreign keys and the tables they reference in Oracle DB
Mar 19, 2019 · I'm trying to find a query which will return me a list of the foreign keys for a table and the tables and columns they reference. I am half way there with SELECT a.table_name, …
Como adicionar uma foreign key em uma tabela já criada
Jan 30, 2016 · Sou iniciante em mysql e não consigo adicionar uma fk em uma tabela que criei. Tenho duas tabelas (pessoa, objeto) e desejo criar uma 'fk_pessoa' em objeto que receba o …
How to create a foreign key in phpmyadmin - Stack Overflow
Jun 3, 2016 · Thank you Alok! great answer I am new to using php so this is a great help - If I opt to create the foreign key using an sql statement - ` ALTER TABLE Patient ADD CONSTRAINT …
What is a proper naming convention for MySQL FKs?
Feb 10, 2010 · The reason for creating a symbolic name is for referencing when you want/need to drop the constraint. Oracle & SQL Server allow you to disable specific constraints. If you don't …
Does a foreign key automatically create an index?
An FK-relationship will often need to look up a relating table and extract certain rows based on a single value or a range of values. So it makes good sense to index any columns involved in an …
sql - The ALTER TABLE statement conflicted with the FOREIGN KEY ...
Why does add a foreign key to the tblDomare table result in this error? The ALTER TABLE statement conflicted with the FOREIGN KEY constraint …
sql server - Cannot truncate table because it is being referenced …
Oct 31, 2008 · Remove the FK, truncate the table, and recreate the FK. I thought that as long as I truncated the child table before the parent, I'd be okay without doing either of the options …
How do I drop a foreign key in SQL Server? - Stack Overflow
Sep 18, 2008 · Your syntax for dropping the FK doesn't need the words "foreign key". This is the syntax for MySQL, not SQL Server. You can replace it with the word "constraint".
mysql - Add Foreign Key to existing table - Stack Overflow
I want to add a Foreign Key to a table called "katalog". ALTER TABLE katalog ADD CONSTRAINT `fk_katalog_sprache` FOREIGN KEY (`Sprache`) REFERENCES `Sprache` …
Differences between "foreign key" and "constraint foreign key"
Sep 29, 2012 · I mean for example I can create table like create table XTable ( idt int not null primary key, value nvarchar(50), idq int, constraint fk_idq foreign key(idq) references …