SQL · Theory

TAN()()

Theory

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TAN()()

TAN()() (math) sits in a small live site. Arun’s job is a TAN math dry-run. Write that first.

Do TAN()() (math) once by hand. one TAN math step Arun can write from memory. Change one input. Say the new result out loud.

Skip TAN()() (math) and copy-pasting TAN math without a dry-run shows up in a small live site.

Arun ships TAN()() (math) in a small live site. That is the use case worth saying.

TAN()() (math) trap — copy-pasting TAN math without a dry-run. Arun loses marks for that every viva.

TAN()() (math) is not a lonely heading. Arun ties it to a TAN math dry-run.

One breath for TAN()() (math), then a TAN math dry-run, then copy-pasting TAN math without a dry-run. Sit down.

Exam tip

Say TAN()() (math) in one breath, then one TAN math step Arun can write from memory, then copy-pasting TAN math without a dry-run.

TAN()() — sample query

-- TAN()()
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;

TAN()(): create two demo rows, then SELECT qty >= 2 ordered. Say which labels come back.

Short notes

DefTAN()() (math) — Arun uses it for a TAN math dry-run in a small live site.
RuleTAN()() (math) → one TAN math step Arun can write from memory.
RememberTAN()() (math) + InnoDB (a small live site).
UseTAN()() (math) in a small live site (a TAN math dry-run).
TrapTAN()() (math) — copy-pasting TAN math without a dry-run.
ExTAN()() (math) → a TAN math dry-run.

-- TAN()() 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;

TAN()()

TAN()() — sample query

Short notes

Questions

TAN()()

TAN()() — sample query

Short notes

Questions