SQL · Theory

Prepared Statement

Theory

312/439

Prepared Statement

Prepared Statement is simple if you keep it on paper. Ananya uses it for Ananya walking through Prepared Statement in a first job task.

Prepared Statement order: meaning → one Prepared Statement step Ananya can write from memory → one limit. Dumping ten features helps nobody.

Prepared Statement exists so Ananya can keep Ananya walking through Prepared Statement correct in a first job task.

Ananya ships Prepared Statement in a first job task. That is the use case worth saying.

Prepared Statement trap — only reciting the name of Prepared Statement. Ananya loses marks for that every viva.

Place Prepared Statement next to nearby SQL work — one Prepared Statement step Ananya can write from memory is the link.

Viva for Prepared Statement: what it is → one Prepared Statement step Ananya can write from memory → the mistake (only reciting the name of Prepared Statement).

Exam tip

Board: Ananya walking through Prepared Statement. Dry-run Prepared Statement. Name the trap: only reciting the name of Prepared Statement.

Prepared Statement — sample query

-- Prepared Statement
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;

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

Short notes

DefPrepared Statement — Ananya uses it for Ananya walking through Prepared Statement in a first job task.
RulePrepared Statement → one Prepared Statement step Ananya can write from memory.
RememberPrepared Statement + the query planner (a first job task).
UsePrepared Statement in a first job task (Ananya walking through Prepared Statement).
TrapPrepared Statement — only reciting the name of Prepared Statement.
ExPrepared Statement → Ananya walking through Prepared Statement.

-- Prepared Statement 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;

Prepared Statement

Prepared Statement — sample query

Short notes

Questions

Prepared Statement

Prepared Statement — sample query

Short notes

Questions