We ran into a problem with out primary key.It was set to a meaningful value for ease of data entry since all data was originally added directly.However now the meaningful value is not always present i
I basically want to convert a table from mysql to sqlite with the following scheme: create table items (
I have a table in Oracle DB,say, Student table. StudentID is the primary key in the table.I have another column interested subjects,say columns name is interested_SUB. A student can have more than one
I\'ve read about primary, unique, clustered indexes etc. But I need to understand it via an example.
I would like create a table and add to it a Primary Key. As for m开发者_StackOverflow社区y understanding MS SQL add a clustered Index on the Primary Key and will name it with a default name.
wondering if the GAE keys (com.google.appengine.api.datastore.Key) can be used with local mysql apps? I presume it\'s not possible, so if I define my primary keys in my models as longs, do I lose too
In a RoR migration, how do I auto increment a开发者_如何学运维 non-primary-key field? I\'d like to do this in the db definition, and not in the model.You need to execute an SQL statement.
I\'m building a commenting mechanism into an application that allows a programmer/plugin author to implement comment threads in a simple manner.
I have a table: id:int revision:int text:ntext In general I will need to retrieve the latest revision of text for a particular id, or (considerably less frequently)开发者_JAVA技巧 add a new row con
I have 2 tables: create table numbers2 ( id1 int IDENTITY(1,1) not null, id2 int not null, primary key(id1, id2)
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