unique-constraint

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Oracle unique constraint error when inserting

INSERT INTO SS_ALERT_EVENTS (ALERT_ID, EVENT_ID, TIME_DURATION, ALERT_EVENT_EFFECT, DATASET_ASSIGN_RULE, KEY_FIELDS_ASSIGN_RULE, SIDE, ALERT_VALIDATION_RULE, UNIQUE_ID ) VALUES ( \'test1\', 7 ,0, 1 ,N[详细]

2023-02-15 12:36 分类：问答
How can I create a unique constraint on my column (SQL Server 2008 R2)?

I have SQL Server 2008 R2 and I want to set a unique column. There seems to be two ways to do this: \"unique index\" and \"unique constraint\".They are not much different from what I understand, alth[详细]

2023-02-14 19:36 分类：问答
MySQL UNIQUE Constraint with a condition

I\'m trying to create a unique index constraint for two columns (id_1 and id_2) with the following condition:[详细]

2023-02-12 02:34 分类：问答
MySQL - Make an existing Field Unique

I have an already existing table with a field that should be unique but is not. I only know this because an entry was made into the table that had the same value as another, already existing, entry an[详细]

2023-02-11 14:44 分类：问答
HABTM - uniqueness constraint

I have two models with a HABTM relationship - User and Role. user - 开发者_如何转开发has_and_belongs_to_many :roles[详细]

2023-02-10 12:31 分类：问答
UNIQUE Constraint, only when a field contains a specific value

I\'m trying to create a UNIQUE INDEX constraint for two columns, but only when another column contains the value 1. For example, column_1 and column_2 should be UNIQUE only when active = 1. Any rows t[详细]

2023-02-10 04:36 分类：问答
MySQL unique index by multiple fields

We have a special kind of table in our DB that stores the history of its changes in itself. So called \"self-archived\" table:[详细]

2023-02-05 17:50 分类：问答
perform delete or update on unique violation in postgres

On Unique_violation exception how to update or delete the row which raised the exception table code and insert[详细]

2023-02-04 12:48 分类：问答
How can i make ruby on rails handle duplicate record errors from MySQL

I have a unique index on multiple fields on my database. So if you try to call save on a duplicate record, it raises ActiveRecord::StatementInvalid and shows the mysql error. Is there a way to handle[详细]

2023-01-30 08:16 分类：问答
Recursive "ON DUPLICATE KEY UPDATE"

I have a database table with a UNIQUE key on a date column so that there can never be more than one row per date. If I insert a new row for a day that already exists in the database, I’d like it to p[详细]

2023-01-27 07:32 分类：问答