Sql server management studio foreign key tutorial

Im creating some tables with an oracle spatial writer but its creating them without a primary key. I am using a sequence in oracle to increment . Oracle 12c release has primary key auto increment feature with identity type column. Create Table With Identity . Introduction For data replication products like Oracle GoldenGate (OGG), it is typically a best practice to have a primary key or unique index . A foreign key is a field (or collection of fields) in a table whose value is required to match the value of the primary key for a second table.

Usually a foreign key is . When you disable unique or primary key constraints, Oracle drops the associated unique index. When you reenable these constraints, Oracle builds the index. Find out why the Oracle ALTER TABLE ADD CONSTRAINT command can be used instead of a UNIQUE index vs.

I have primary keys in my database which are of NVARCHARtype. By default data is inserted into these columns as case sensitive which .