Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is updated or ...

There are two categories of integrity constraints: General constraints, which allow you to restrict the data values that are accepted for the variables in a single data file, such as requiring that ...

-- Primary key -- Constraint -- parimary key constraint -- (value can not be null and cannot repeat) -- there can be only one primary key in a table drop table snapdeal_orders; create table ...

When I am working with an Oracle database, I still find myself using SQL*Plus for many quick and dirty database queries. In particular, I often look up constraints in SQL*Plus. In this post, I look at ...

Primary key constraints fail to be dropped when there are dependent foreign key constraints. Database Error in model ..... Cannot delete constraint `..._pk` with non ...