SQL · Theory

Optimize Table

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Optimize Table

Priya only reaches for Optimize Table when Optimize Table on Priya's board has to stay correct in a first job task.

Keep Optimize Table small. Priya should finish Optimize Table on Priya's board in a few lines, not a 40-line dump.

Skip Optimize Table and only reciting the name of Optimize Table shows up in a first job task.

Use Optimize Table when Optimize Table on Priya's board must stay clear. If a simpler SQL step works, use that instead.

Optimize Table miss — only reciting the name of Optimize Table. Fix it before you talk about advanced SQL.

Place Optimize Table next to nearby SQL work — one Optimize Table step Priya can write from memory is the link.

One breath for Optimize Table, then Optimize Table on Priya's board, then only reciting the name of Optimize Table. Sit down.

Exam tip

For Optimize Table: definition + a first job task + one failure.

Optimize Table — sample query

-- Optimize Table
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;

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

Short notes

DefOptimize Table — Priya uses it for Optimize Table on Priya's board in a first job task.
RuleOptimize Table → one Optimize Table step Priya can write from memory.
RememberOptimize Table + the query planner (a first job task).
UseOptimize Table in a first job task (Optimize Table on Priya's board).
TrapOptimize Table — only reciting the name of Optimize Table.
ExOptimize Table → Optimize Table on Priya's board.

-- Optimize Table 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;

Optimize Table

Optimize Table — sample query

Short notes

Questions

Optimize Table

Optimize Table — sample query

Short notes

Questions