In SQL Server CE, foreign key constraints on nvarchar fields are only enforced after dropping the trailing whitespace. This means that if the PK is \"foo \" I can insert \"foo\" into the FK.
I have an entity A that has a foreign key of entity B: ent开发者_开发技巧ity A --> id, entity_a_name, foreign_key_entity_B
I have the following structure SET SQL_MODE=\"NO_AUTO_VALUE_ON_ZERO\"; CREATE TABLE IF NOT EXISTS `sis_param_tax` (
Assume I have a two tables, A and B. Table A has a primary key called A_ID of type int, and table B has a foreign key called A_ID.
This is more of a generic SQL problem but I\'m using Firebird 2.5 if anyone knows of a Firebird/Interbase specific optimization.First, the following is a simplified example schema to illustrate the is
Let me state a simple example: You have an Order and a Shopping Cart. One way I envision persisting this is to save an Order document and a Cart document. The Order document could have a field called
I\'m a normal \"would be DBA\" level developer. I\'ve been handling some databases with a few million records. A lot goes around importing data between database and its clone and then using that clone
@Entity @Table(name = \"BOOKTEST\") @NamedQueries({@NamedQuery(name = \"Booktest.findAll\", query = \"SELECT b FROM Booktest b\"), @NamedQuery(name = \"Booktest.findById\", query = \"SELECT b FROM Boo
entity A --> id, entity_a_name, foreign_key_entity_B entity B ---> id, entity_b_name when i delete entity B record, it suppose to auto deleteentity A that has foreign_key_entity_B?
i have entity A that has foreign key to entity B,does entity B need to have foreign key back to entity A? if yes, how?
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