SQL · Theory

Table Structure

Theory

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Table Structure

Table Structure is simple if you keep it on paper. Priya uses it for Priya walking through Table Structure in lab hour.

Table Structure order: meaning → one Table Structure step Priya can write from memory → one limit. Dumping ten features helps nobody.

Skip Table Structure and only reciting the name of Table Structure shows up in lab hour.

Priya ships Table Structure in lab hour. That is the use case worth saying.

Table Structure trap — only reciting the name of Table Structure. Priya loses marks for that every viva.

Table Structure is not a lonely heading. Priya ties it to Priya walking through Table Structure.

One breath for Table Structure, then Priya walking through Table Structure, then only reciting the name of Table Structure. Sit down.

Exam tip

For Table Structure: definition + lab hour + one failure.

Table Structure — sample query

-- Table Structure
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;

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

Short notes

DefTable Structure — Priya uses it for Priya walking through Table Structure in lab hour.
RuleTable Structure → one Table Structure step Priya can write from memory.
RememberTable Structure + the query planner (lab hour).
UseTable Structure in lab hour (Priya walking through Table Structure).
TrapTable Structure — only reciting the name of Table Structure.
ExTable Structure → Priya walking through Table Structure.

-- Table Structure 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;

Table Structure

Table Structure — sample query

Short notes

Questions

Table Structure

Table Structure — sample query

Short notes

Questions