Constraint/SQL -- Constraint drop table snapdeal_orders; create table snapdeal_orders ( order_Id int not null, -- now we can not add null value in column order_id , not null constraint order_date date ...

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Sql constraintsa constraint is a rule or limitation that we place on the data in a database that we can put into a column(s). a constraint is part of the table. we can apply constraints when we create ...

Learn what is the syntax for creating a check constraint in SQL and how to use it to validate your data and enforce data integrity rules on your tables.

Complex SQL queries are widely used today, but it is rather difficult to check if a complex query has been written correctly. Formal verification based on comparing a specification with an ...