A key is a set of attributes that is irreducibly unique and non-nullable within a table.
I am trying to change the primary key of a table in my SQL database from the existing key to …
sql sql-server primary-key composite-primary-keyWhen an integer column is marked as a primary key in an SQLite table, should an index be explicitly created …
sqlite indexing primary-keyIs there a way to set the PRIMARY KEY in a single "CREATE TABLE AS" statement? Example - I would …
postgresql primary-key create-tableIs it possible to auto-increment a non-Primary Key? Table "book_comments" book_id medium_int timestamp medium_int user_id …
mysql primary-key innodbI am currently using... select Table_Name, Column_name, data_type, is_Nullable from information_Schema.Columns ...to determine information …
sql-server code-generation primary-key data-access-layerI am working on a JPA project. I need to use a @OneToMany mapping on a class that has three …
jpa persistence primary-key many-to-oneI was wondering if anybody knew a good way to create a unique random integer id for a primary key …
mysql sql primary-key uniqueidentifierShould I always have a primary key in my database tables? Let's take the SO tagging. You can see the …
database primary-key modelingWe have a table with a composite Primary key consisting of three fields (and it is in MySQL 5.1). There are …
mysql performance primary-key composite-keyHas someone ever measured performance of Sequential Guid vs. Standard Guid when used as Primary Keys inside a database? I …
database primary-key guid