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check constraint in sql for gender

Constraints in SQL

Constraints in SQL or PostgreSQL is like ‘gate keepers’ which controls the type of data that can go into a table. Constraints are the rules that enforced on the data columns of a table. This ensures the accuracy and reliability of the data in the database. It maintains the integrity of data in the table. Levels of Constraints in SQL Constraints could be on a column level or a table… Read More »Constraints in SQL/PostgreSQL

Constraints in SQL/PostgreSQL

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