stored function - array parameter - how many element in array ?

hello,

 

the question is very clear .. when we write stored function, we can use array parameter as a variable  .. but, in the function, how do i know how many element in that array ?

 

i want to perform some dml operations about each one like (delete, update or delete)

 

can anyone show me the example or tell me the function name i should use ..

 

regards

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