SQL · Theory

CURRENT_TIME()

Theory

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CURRENT_TIME()

CURRENT_TIME() is simple if you keep it on paper. Asha uses it for CURRENT_TIME on Asha's board in a campus project.

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

Without CURRENT_TIME(), a campus project gets messy and CURRENT_TIME on Asha's board is hard to trust.

Use CURRENT_TIME() when CURRENT_TIME on Asha's board must stay clear. If a simpler SQL step works, use that instead.

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

CURRENT_TIME() is not a lonely heading. Asha ties it to CURRENT_TIME on Asha's board.

One breath for CURRENT_TIME(), then CURRENT_TIME on Asha's board, then only reciting the name of CURRENT_TIME. Sit down.

Exam tip

For CURRENT_TIME(): definition + a campus project + one failure.

CURRENT_TIME() — sample query

-- CURRENT_TIME()
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;

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

Short notes

DefCURRENT_TIME() — Asha uses it for CURRENT_TIME on Asha's board in a campus project.
RuleCURRENT_TIME() → one CURRENT_TIME step Asha can write from memory.
RememberCURRENT_TIME() + the query planner (a campus project).
UseCURRENT_TIME() in a campus project (CURRENT_TIME on Asha's board).
TrapCURRENT_TIME() — only reciting the name of CURRENT_TIME.
ExCURRENT_TIME() → CURRENT_TIME on Asha's board.

-- CURRENT_TIME() 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;

CURRENT_TIME()

CURRENT_TIME() — sample query

Short notes

Questions

CURRENT_TIME()

CURRENT_TIME() — sample query

Short notes

Questions