Oracle Trigger creation with compilation errors, ORA-02289: sequence does not exist

Question

When I generate the SQL using PowerDesigner and run it in Oracle, it throws the error

Warning:Trigger creation with compilation errors

Answer 1

Before create trigger you need create sequnce Create sequence material_classify_seq start with 1; after create trigger

Answer 2

The error message suggests that sequence material_classify_seq is missing. You can create the missing sequence with the following SQL statement:

Create Sequence material_classify_seq;