unique-key

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Making varchar(500) datacolumn unique

I have a requirement to make a column of varcha开发者_开发知识库r(500) unique. Putting unique constraint would not work as it crosses the size limit of unique.[详细]

2023-04-10 02:02 分类：问答
Which unique id to use for blogs and comments?

This is a question that arose from the consequences of another question here: Is it better to have two separate user tables or one?[详细]

2023-04-08 17:00 分类：问答
Motorola MC55 Unique ID

In Motorola MC55, I\'d like to get the factory or unique id or serial no of the scanner. How to 开发者_C百科code it in vb.net?Since its a piece of mobile equipment it will have an IMEI number, so how[详细]

2023-04-06 06:33 分类：问答
Duplicate data while using a unique key

For my table I\'ve defined a unique index on activity_id-actor_id-end_date; mysql> show keys from sg_activity_property;[详细]

2023-04-02 12:36 分类：问答
Flex 4.5 - unique computer information

I am developing a flex 4.5 web based application and I need to make sure if the client chooses a certain level of security, each user can log only from an authorized computer.[详细]

2023-04-01 09:45 分类：问答
How to generate unique 64-bit keys

I would like to generate unique 64-bit keys (pseudo)-randomly to identify objects in our model. I need the keys to be as unique as possible (minimize the probability of collisions when any N keys are[详细]

2023-04-01 06:49 分类：问答
ETL into operational oracle database - used by jsp/spring/hibernate app

I am needing to have some legacy data loaded into an operational oracle (11gR2) database. The database is being used by a jsp/spring/hibernate (3.2.5.ga) applicat开发者_开发问答ion. A sequence is used[详细]

2023-03-26 21:50 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
Duplicate unique key error after rollback in mysql

I have a table like this mysql> describe seudonimos; +--------------+------------------+------+-----+---------+----------------+[详细]

2023-03-25 15:29 分类：问答
Get MySQL Unique Key Combos

If I have a table created similarly to the following: CREATE TABLE MyTable( id1Part1 INT NOT NULL, id1Part2 INT NOT NULL,[详细]

2023-03-23 12:31 分类：问答