foreign key constraint naming scheme - Stack Overflow
What is a standard naming scheme to use for foreign key constraints? Given these tables task (id, userid, title) note (id, taskid, userid, note); user (id, name) where Tasks have Notes, Tasks are ...
How to rename FK in MS SQL - Stack Overflow
Sep 21, 2016 · will rename FK_Employee_Person_BusinessEntityID found in the HumanResources schema to FK_EmployeeID If the schema is missing, SQL Server looks for objects in the user's …
How to find foreign key dependencies in SQL Server?
May 29, 2009 · How can I find all of the foreign key dependencies on a particular column? What are the different alternatives (graphically in SSMS, queries/views in SQL Server, 3rd party database tools, …
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 have fk in …
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 YTable(idq) ) and...
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, a.column_n...
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 FK, but an …
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 - FK or FPK? Relational Databases - Stack Overflow
Jun 28, 2017 · What do you mean by "FK" (foreign key) then? What academic (organization/person) textbook are you using? In the relational model (but not SQL): A superkey is a set of columns with …
mysql - ERROR 1452: Cannot add or update a child row: a foreign key ...
Feb 9, 2014 · Taken from Using FOREIGN KEY Constraints Foreign key relationships involve a parent table that holds the central data values, and a child table with identical values pointing back to its …