Technology LearningCheat Sheet
DATABASECHEAT SHEETS
SHEET 10
Views, Triggers and Privacy
M.R. Sterling
Database Advanced · Sheet 10
Views, Triggers and PrivacySQLite
Who sees what, one patient at a time: views that hide columns, masking with SUBSTR and ||, an age-band view for research, a change log written by an AFTER trigger, and a BEFORE trigger that refuses a bad charge.
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Who sees what
CREATE VIEW
Drop and rebuild
Always live, and read-only
Masking
De-identify with CASE
Protect the stored data
AFTER and BEFORE triggers
CTE with WITH
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