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When you use Core Data with SQLite database as underlying data store, core data will autogenerate some columns…
One of them is “Z_ENT” and another is “Z_OPT”
I believe “Z_OPT” is for how many times the record has been altered. Can anyone tell me what Z_ENT is for?
Thanks!
“Z_PK is the unique id for each, Z_ENT is their entity id (same as what’s listed in the Z_PRIMARYKEY table”
From here