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Log trigger
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<p>In <a href="/facts/Relational_database/pEKGmJLy">relational databases</a>, the log trigger or history trigger is a mechanism for automatic recording of information about changes inserting or/and updating or/and deleting <a href="/facts/Row_(database)/PIpv7c9e">rows</a> in a <a href="/facts/Table_(database)/5INvK1Vd">database table</a>. </p><p>It is a particular technique for <a href="/facts/Change_data_capture/WkP5WXgf">change data capturing</a>, and in <a href="/facts/Data_warehousing/we5rblq9">data warehousing</a> for dealing with <a href="/facts/Slowly_changing_dimension/XfWHE7R1">slowly changing dimensions</a>. </p>