SQL · Theory

Database Encryption

Theory

439/439

Database Encryption

Database Encryption is simple if you keep it on paper. Sara uses it for a Database Encryption dry-run in a campus project.

Keep Database Encryption small. Sara should finish a Database Encryption dry-run in a few lines, not a 40-line dump.

Skip Database Encryption and copy-pasting Database Encryption without a dry-run shows up in a campus project.

Use Database Encryption when a Database Encryption dry-run must stay clear. If a simpler SQL step works, use that instead.

Database Encryption trap — copy-pasting Database Encryption without a dry-run. Sara loses marks for that every viva.

Place Database Encryption next to nearby SQL work — one Database Encryption step Sara can write from memory is the link.

Close Database Encryption with: “If I skip it, a Database Encryption dry-run goes wrong like this: copy-pasting Database Encryption without a dry-run.”

Exam tip

Board: a Database Encryption dry-run. Dry-run Database Encryption. Name the trap: copy-pasting Database Encryption without a dry-run.

Database Encryption — sample query

-- Database Encryption
CREATE TABLE demo (
  id INTEGER PRIMARY KEY,
  label TEXT NOT NULL,
  qty INTEGER DEFAULT 0
);
INSERT INTO demo (id, label, qty) VALUES
  (1, 'alpha', 2),
  (2, 'beta', 5);
SELECT label, qty FROM demo WHERE qty >= 2 ORDER BY qty DESC;

Database Encryption: create two demo rows, then SELECT qty >= 2 ordered. Say which labels come back.

Short notes

DefDatabase Encryption — Sara uses it for a Database Encryption dry-run in a campus project.
RuleDatabase Encryption → one Database Encryption step Sara can write from memory.
RememberDatabase Encryption + the query planner (a campus project).
UseDatabase Encryption in a campus project (a Database Encryption dry-run).
TrapDatabase Encryption — copy-pasting Database Encryption without a dry-run.
ExDatabase Encryption → a Database Encryption dry-run.

-- Database Encryption CREATE TABLE demo ( id INTEGER PRIMARY KEY, label TEXT NOT NULL, qty INTEGER DEFAULT 0 ); INSERT INTO demo (id, label, qty) VALUES (1, 'alpha', 2), (2, 'beta', 5); SELECT label, qty FROM demo WHERE qty >= 2 ORDER BY qty DESC;

Database Encryption

Database Encryption — sample query

Short notes

Questions

Database Encryption

Database Encryption — sample query

Short notes

Questions