It uniquely identifies each row in a table -- 4 FOREIGN KEY - Prevents actions that would destroy links between tables -- 5 DEFAULT - Sets a default value for a column if no value is specified -- 6 ...

Tasks Create the Database and Table : To start, we create a database named Sales, then define a table Orders with the specified constraints. Add a New Column : Add a new column order_quantity to the ...

See A DBMS Table for a conceptual picture of a table. In a relational DBMS, you use a high-level language to operate on the data managed by the DBMS. In many cases, that language is SQL. A DBMS ...

In particular, I often look up constraints in SQL*Plus. In this post, I look at the Oracle database views and queries that I use most to get an idea what constraints I am dealing with.

The SQL Procedure Pass-Through Facility is an extension of the SQL procedure that enables you to send DBMS-specific statements to a DBMS and to retrieve DBMS data. You specify DBMS SQL syntax instead ...

Key and referential constraints are the two main integrity constraints in database applications. These constraints can be enforced by the Database Management System automatically. Any violation from ...