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Tag Archives: postgreSQL-constraints

In PostgreSQL, the CHECK constraint is primarily used to specify if a value in a column necessarily meets a specific requirement. The CHECK constraint utilizes… Read More
PostgreSQL provides the user with a UNIQUE constrain that is used to make sure that values stored in a column or a group of columns… Read More
In this article we will look into the PostgreSQL Primary key constraints using SQL statements. A primary key is a column or a group of… Read More
PostgreSQL Not-Null constraint as the name suggests is used to ensure that any value in the respective column is not null. In the world of… Read More
PostgreSQL also provides on an expression as DISTINCT ON that is used with the SELECT statement to remove duplicates from a query set result just… Read More