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sql - ORA-04091: table is mutating, trigger/function may not see it, ORA-06512:, ORA-06512: at "SYS.DBMS_SQL", line 1721 - Stack Overflow
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PDF) The Three Characteristics of Triggers: Action, Level, Timing • Action - Refers to triggering SQL statements: INSERT, UPDATE, and DELETE - A trigger can be designed to fire on any combination
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