SQLAlchemy many-to-many UNIQUE constraint failed association table...

SQL Server :: create an ERD from a database without constraints...

Unique (multiple columns) and null in one column...

How to save model in Django with unique but null fields...

Java Mysql Integrity Constraint Violation Exception...

cannot set null to a unique column...

Unique index with a lots of columns...

belongsToMany: allow and reuse an associated entry with existing UNIQUE title...

SQLITE create table with UNIQUE column...

How can I switch two fields of a unique row within one commit using SQLAlchemy?...

Hibernate adds unwanted unique key itself In @OneToMany mapping...

Django Form with validation state for unique...

How can I create a SQL unique constraint based on 2 columns?...

Why does Getting a record, modifying its primary key, and then Putting it back seem to overwrite the...

Postgres - set unique constraint in a column based on another column...

Unique constraint not created in JPA...

Formulate conditional Q on Unique Constraint for exception handling...

Unique constraint by 2 columns where one has a specific value...

Unique constraint where only one row can be 'Yes' (but based on values in other columns)...

How to add an unique constraint (ignoring special characters) on a text column in postgres?...

How to check for matching in SQLite in order to insert new data or update them?...

how to call back unique together constraints as a field django...

Apply unique constraint to columns on two separate tables (Django, postgres)...

How to persist @ManyToMany relation - duplicate entry or detached entity...

display unique constraints errors message in html template dango...

PostgreSQL constraint with Null Value...

Constraining instantiation of a regular class based on foreginkeys to a regular class and an abstrac...

How to get the unique values in nested 2d array based on specific index in ruby...

Django unique together constraint in two directions...

Conditional Unique Constraint SQL...