Foreign keys are a data integrity feature of relational (and SQL) databases.
Please clarify two things for me: Can a Foreign key be NULL? Can a Foreign key be duplicate? As fair …
sql sql-server oracle foreign-keysIs there a nice easy way to drop all tables from a MySQL database, ignoring any foreign key constraints that …
mysql foreign-keys innodb sql-dropI have a table whose primary key is used in several other tables and has several foreign keys to other …
mysql foreign-keys constraints mysql-error-1025If I want to delete all the tables in my database like this, will it take care of the foreign …
sql-server foreign-keys constraints database-table drop-tableI use "ON DELETE CASCADE" regularly but I never use "ON UPDATE CASCADE" as I am not so sure in …
sql foreign-keys foreign-key-relationshipIn Oracle SQL Developer, if I'm viewing the information on a table, I can view the constraints, which let me …
sql oracle foreign-keys oracle-sqldeveloperI want to remove constraints from my table. My query is: ALTER TABLE `tbl_magazine_issue` DROP CONSTRAINT `FK_tbl_…
mysql foreign-keys constraints alterIn class, we are all 'studying' databases, and everyone is using Access. Bored with this, I am trying to do …
mysql sql foreign-keys relational-databaseI want to remove foreign key from another table so i can insert values of my choice. I am new …
sql-server database foreign-keysI have a problem when trying to add a foreign key to my tblDomare table; what am I doing wrong …
sql sql-server database foreign-keys