===== Entity Integrity =====
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]


**Entity Integrity** relies on the creation of primary keys, or unique values that identify pieces of data, to ensure that data isn't listed more than once and that no field in a table is null. It's a feature of relational systems which store data in tables that can be linked and used in a variety of ways.

Source: [[https://www.talend.com/resources/what-is-data-integrity/ | Entity Integrity ]]