SQL · Theory

Character Set

Theory

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Character Set

Priya only reaches for Character Set when Priya walking through Character Set has to stay correct in a viva board.

Do Character Set once by hand. one Character Set step Priya can write from memory. Change one input. Say the new result out loud.

Without Character Set, a viva board gets messy and Priya walking through Character Set is hard to trust.

Use Character Set when Priya walking through Character Set must stay clear. If a simpler SQL step works, use that instead.

Character Set miss — skipping the failure case for Character Set. Fix it before you talk about advanced SQL.

Character Set is not a lonely heading. Priya ties it to Priya walking through Character Set.

Viva for Character Set: what it is → one Character Set step Priya can write from memory → the mistake (skipping the failure case for Character Set).

Exam tip

Board: Priya walking through Character Set. Dry-run Character Set. Name the trap: skipping the failure case for Character Set.

Character Set — sample query

-- Character Set
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;

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

Short notes

DefCharacter Set — Priya uses it for Priya walking through Character Set in a viva board.
RuleCharacter Set → one Character Set step Priya can write from memory.
RememberCharacter Set + an index (a viva board).
UseCharacter Set in a viva board (Priya walking through Character Set).
TrapCharacter Set — skipping the failure case for Character Set.
ExCharacter Set → Priya walking through Character Set.

-- Character Set 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;

Character Set

Character Set — sample query

Short notes

Questions

Character Set

Character Set — sample query

Short notes

Questions