SQL · Theory

Datatypes

Theory

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Datatypes

Datatypes (in php) is simple if you keep it on paper. Sara uses it for Datatypes in php on Sara's board in lab hour.

Datatypes (in php) on the board: one Datatypes in php step Sara can write from memory. Then say what Datatypes in php on Sara's board looks like after.

Datatypes (in php) exists so Sara can keep Datatypes in php on Sara's board correct in lab hour.

Datatypes (in php) shows up in lab hour. Name Datatypes in php on Sara's board, not “a real-world scenario”.

Datatypes (in php) miss — only reciting the name of Datatypes in php. Fix it before you talk about advanced SQL.

Place Datatypes (in php) next to nearby SQL work — one Datatypes in php step Sara can write from memory is the link.

Close Datatypes (in php) with: “If I skip it, Datatypes in php on Sara's board goes wrong like this: only reciting the name of Datatypes in php.”

Exam tip

Say Datatypes (in php) in one breath, then one Datatypes in php step Sara can write from memory, then only reciting the name of Datatypes in php.

Datatypes — sample query

-- Datatypes
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;

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

Short notes

DefDatatypes (in php) — Sara uses it for Datatypes in php on Sara's board in lab hour.
RuleDatatypes (in php) → one Datatypes in php step Sara can write from memory.
RememberDatatypes (in php) + an index (lab hour).
UseDatatypes (in php) in lab hour (Datatypes in php on Sara's board).
TrapDatatypes (in php) — only reciting the name of Datatypes in php.
ExDatatypes (in php) → Datatypes in php on Sara's board.

-- Datatypes 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;

Datatypes

Datatypes — sample query

Short notes

Questions

Datatypes

Datatypes — sample query

Short notes

Questions