Primary keys are always indexed and unique (the ... in Oracle, it was PL-SQL. Both databases have added additional languages for stored procedures, such as C#, Java, and R. A simple T-SQL stored ...

SQLite does things quite differently than most mainstream SQL database engines; it helps to understand what ... c.open(); c.execute("create table Hens ( Id int primary key, Name text )"); statement s; ...

This, or these, attribute(s) are the candidate key(s) for the structure. The candidate key is also known as the primary key, or if a structure ... Generated keys can be a useful tool in creating ...