SQL · Theory

maketime()

Theory

236/439

maketime()

If you can teach maketime() using a maketime dry-run, you know it. If you only know the heading, you don’t.

maketime() order: meaning → one maketime step Isha can write from memory → one limit. Dumping ten features helps nobody.

maketime() exists so Isha can keep a maketime dry-run correct in a viva board.

Isha ships maketime() in a viva board. That is the use case worth saying.

If a maketime dry-run breaks under maketime(), check copy-pasting maketime without a dry-run first.

After maketime(), Isha should still remember copy-pasting maketime without a dry-run.

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

Exam tip

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

maketime() — sample query

-- maketime()
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;

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

Short notes

Defmaketime() — Isha uses it for a maketime dry-run in a viva board.
Rulemaketime() → one maketime step Isha can write from memory.
Remembermaketime() + InnoDB (a viva board).
Usemaketime() in a viva board (a maketime dry-run).
Trapmaketime() — copy-pasting maketime without a dry-run.
Exmaketime() → a maketime dry-run.

-- maketime() 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;

maketime()

maketime() — sample query

Short notes

Questions

maketime()

maketime() — sample query

Short notes

Questions