I want to check in an Access Database if a primary key exists using VB.Net & OleDb: By primary key name
Is there a way to change the value of a pr开发者_Go百科imary key which is referenced by another table as foreign key? An easier alternative is to insert a new row and delete the old one. (Update any r
Can I specify the initial value for an IDENTITY column using Hibernate/JPA annotations on top of an HSQLDB database?The relevant source code looks like this so far:
I\'m new to SQL, but managed to import my CSV data into an Apache Derby DB using ij. My table contains no primary key, and no existing field is suitable, so I\'d like to create a new field, generate
i trying to retrieve value by referencing primary key in multiple tables but unable to get the result.Here is the table
I can\'t find how to insert 开发者_高级运维a row that doesn\'t have a PK. This isn\'t possible with a class that is extending Zend_Db_Table_Abstract, so how should I do this?
I am creating a database table that\'ll have a list of all Tags available in my application (just like SO\'s tags).
What I\'m t开发者_StackOverflow社区rying to do is ensure entities in my graph are unique.For example, no two users should have the same social security number.
I have a table of Events and a number of subtables of different types to define each event. Event table has an ID, a (potentially non-unique) Datetime, userId, and an event typecode.
The relationship between bands and members, \'MemberOf\', includes a member id (Mid), band id (Bid), \'StartYear\', \'EndYear\' and \'Instrument\' played. Mid and Bid are both foreign keys to Member a
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