Here is a gross oversimplification of an intense setup I am working with. table_1 and table_2 both have auto-increment surrogate primary keys as the ID. info is a table that contains information about both table_1 and table_2. table_1 (id, field) table_2 (id, field, field) info ( ???, field) I am trying to decided if I … Read more
In this code, how to generate a Java class for the composite key (how to composite key in hibernate): create table Time ( levelStation int(15) not null, src varchar(100) not null, dst varchar(100) not null, distance int(15) not null, price int(15) not null, confPathID int(15) not null, constraint ConfPath_fk foreign key(confPathID) references ConfPath(confPathID), primary key … Read more
I have a table: table votes ( id, user, email, address, primary key(id), ); Now I want to make the columns user, email, address unique (together). How do I do this in MySql? Of course the example is just… an example. So please don’t worry about the semantics. 14 s 14 To add a unique … Read more
