SQL · Theory

Number Format

Theory

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Number Format

Ananya only reaches for Number Format when Ananya walking through Number Format has to stay correct in a campus project.

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

Without Number Format, a campus project gets messy and Ananya walking through Number Format is hard to trust.

Ananya ships Number Format in a campus project. That is the use case worth saying.

Don’t do this with Number Format — only reciting the name of Number Format. Interviewers spot it in ten seconds.

Number Format is not a lonely heading. Ananya ties it to Ananya walking through Number Format.

One breath for Number Format, then Ananya walking through Number Format, then only reciting the name of Number Format. Sit down.

Exam tip

Say Number Format in one breath, then one Number Format step Ananya can write from memory, then only reciting the name of Number Format.

Number Format — sample query

-- Number Format
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;

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

Short notes

DefNumber Format — Ananya uses it for Ananya walking through Number Format in a campus project.
RuleNumber Format → one Number Format step Ananya can write from memory.
RememberNumber Format + an index (a campus project).
UseNumber Format in a campus project (Ananya walking through Number Format).
TrapNumber Format — only reciting the name of Number Format.
ExNumber Format → Ananya walking through Number Format.

-- Number Format 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;

Number Format

Number Format — sample query

Short notes

Questions

Number Format

Number Format — sample query

Short notes

Questions