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Partitioning

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Partitioning

Partitioning sits in lab hour. Dev’s job is a Partitioning dry-run. Write that first.

For Partitioning, InnoDB is in play. Don’t blame it until you have traced a Partitioning dry-run.

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

Use Partitioning when a Partitioning dry-run must stay clear. If a simpler SQL step works, use that instead.

If a Partitioning dry-run breaks under Partitioning, check only reciting the name of Partitioning first.

Partitioning is not a lonely heading. Dev ties it to a Partitioning dry-run.

Close Partitioning with: “If I skip it, a Partitioning dry-run goes wrong like this: only reciting the name of Partitioning.”

Exam tip

Board: a Partitioning dry-run. Dry-run Partitioning. Name the trap: only reciting the name of Partitioning.

Partitioning — sample query

-- Partitioning
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;

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

Short notes

DefPartitioning — Dev uses it for a Partitioning dry-run in lab hour.
RulePartitioning → one Partitioning step Dev can write from memory.
RememberPartitioning + InnoDB (lab hour).
UsePartitioning in lab hour (a Partitioning dry-run).
TrapPartitioning — only reciting the name of Partitioning.
ExPartitioning → a Partitioning dry-run.

-- Partitioning 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;

Partitioning

Partitioning — sample query

Short notes

Questions

Partitioning

Partitioning — sample query

Short notes

Questions