SQL · Theory

time_to_sec()

Theory

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time_to_sec()

time_to_sec() is simple if you keep it on paper. Asha uses it for time_to_sec on Asha's board in a viva board.

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

time_to_sec() exists so Asha can keep time_to_sec on Asha's board correct in a viva board.

Asha ships time_to_sec() in a viva board. That is the use case worth saying.

If time_to_sec on Asha's board breaks under time_to_sec(), check only reciting the name of time_to_sec first.

Place time_to_sec() next to nearby SQL work — one time_to_sec step Asha can write from memory is the link.

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

Exam tip

Board: time_to_sec on Asha's board. Dry-run time_to_sec(). Name the trap: only reciting the name of time_to_sec.

time_to_sec() — sample query

-- time_to_sec()
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;

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

Short notes

Deftime_to_sec() — Asha uses it for time_to_sec on Asha's board in a viva board.
Ruletime_to_sec() → one time_to_sec step Asha can write from memory.
Remembertime_to_sec() + InnoDB (a viva board).
Usetime_to_sec() in a viva board (time_to_sec on Asha's board).
Traptime_to_sec() — only reciting the name of time_to_sec.
Extime_to_sec() → time_to_sec on Asha's board.

-- time_to_sec() 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;

time_to_sec()

time_to_sec() — sample query

Short notes

Questions

time_to_sec()

time_to_sec() — sample query

Short notes

Questions