unique-index

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Symfony2 OneToOne relationship becomes either a Unique index or a foreign key?

I\'m开发者_Go百科 taking my first steps in Symfony2 entity relations. I have an entity installation, which each has one meter, and one monitor.[详细]

2023-04-11 23:56 分类：问答
Unique index in already existing database table

I am trying to add a new unique index on one of my database tables in SQL Server 2008.This is an existing table and the column where I want th开发者_运维技巧e unique index already has some duplicate v[详细]

2023-04-01 08:27 分类：问答
NHibernate Delete And Add In ChildCollection Of ParentClass

I have the following problem. I have a parent class with a collection of child objects. public class Parent{[详细]

2023-03-31 23:29 分类：问答
Smart way to get unique index name from SqlException message?

Is there there any smart/best way to get the unique index name from SqlException message? like 开发者_Python百科the following:[详细]

2023-03-26 22:08 分类：问答
MySQL unique composite constraint not working

I\'ve created a unique index like this: ALTER TABLE items ADD UNIQUE INDEX uni_item (warehouse_id, width, height, depth, weight);[详细]

2023-03-26 16:42 分类：问答
Is there any way to make a UNIQUE index case insensitive in Mysql 5.1.x ?

If so - What must change in this table ? CREATE TABLEcontestants ( idContestantsint(10) unsigned NOT NULL AUTO_INCREMENT,[详细]

2023-03-24 17:10 分类：问答
Multiple unique columns but only unique combinations

I\'ve run into a problem with MySQL unique indicies. What I want to do is have something like this: user_idgroup_id[详细]

2023-03-05 07:04 分类：问答
MySQL Make a combination of columns unique

I have a table that stores comments users make about images on the site. The table is structured with four columns, the row_id, which is the primary key, the image_id, the user_id and the comment. Wha[详细]

2023-03-04 18:48 分类：问答
Denormalized many-to-many mapping

In SQL Server 2008 R2 I have a table with the following structure ( IdINT NOT NULL PRIMARY KEY, Left1INT NOT NULL,[详细]

2023-02-24 07:32 分类：问答
MyISAM unique keys being cut off at 64 bytes, causing collisions

I\'ve got a MySQL table that stores urls as unique keys. I\'m starting to get collisions on my keys because it seems the keys themselves are only the first 64 bytes (or characters if you prefer, its a[详细]

2023-02-15 14:01 分类：问答