SQL · Theory

DELETE Record

Theory

34/439

DELETE Record

Ananya only reaches for DELETE Record when DELETE Record on Ananya's board has to stay correct in lab hour.

DELETE Record on the board: one DELETE Record step Ananya can write from memory. Then say what DELETE Record on Ananya's board looks like after.

Without DELETE Record, lab hour gets messy and DELETE Record on Ananya's board is hard to trust.

Use DELETE Record when DELETE Record on Ananya's board must stay clear. If a simpler SQL step works, use that instead.

If DELETE Record on Ananya's board breaks under DELETE Record, check only reciting the name of DELETE Record first.

DELETE Record is not a lonely heading. Ananya ties it to DELETE Record on Ananya's board.

Viva for DELETE Record: what it is → one DELETE Record step Ananya can write from memory → the mistake (only reciting the name of DELETE Record).

Exam tip

Board: DELETE Record on Ananya's board. Dry-run DELETE Record. Name the trap: only reciting the name of DELETE Record.

DELETE Record — sample query

CREATE TABLE tags (id INTEGER PRIMARY KEY, label TEXT);
INSERT INTO tags VALUES (1, 'old'), (2, 'keep');
DELETE FROM tags WHERE label = 'old';
SELECT * FROM tags;

DELETE Record — dELETE removes matching rows. TRUNCATE clears a whole table faster (MySQL).

Short notes

DefDELETE Record — Ananya uses it for DELETE Record on Ananya's board in lab hour.
RuleDELETE Record → one DELETE Record step Ananya can write from memory.
RememberDELETE Record + the query planner (lab hour).
UseDELETE Record in lab hour (DELETE Record on Ananya's board).
TrapDELETE Record — only reciting the name of DELETE Record.
ExDELETE Record → DELETE Record on Ananya's board.

SQL · Theory

DELETE Record

← All stacks

Theory

34/439

DELETE Record

Ananya only reaches for DELETE Record when DELETE Record on Ananya's board has to stay correct in lab hour.

DELETE Record on the board: one DELETE Record step Ananya can write from memory. Then say what DELETE Record on Ananya's board looks like after.

Without DELETE Record, lab hour gets messy and DELETE Record on Ananya's board is hard to trust.

Use DELETE Record when DELETE Record on Ananya's board must stay clear. If a simpler SQL step works, use that instead.

If DELETE Record on Ananya's board breaks under DELETE Record, check only reciting the name of DELETE Record first.

DELETE Record is not a lonely heading. Ananya ties it to DELETE Record on Ananya's board.

Viva for DELETE Record: what it is → one DELETE Record step Ananya can write from memory → the mistake (only reciting the name of DELETE Record).

Exam tip

Board: DELETE Record on Ananya's board. Dry-run DELETE Record. Name the trap: only reciting the name of DELETE Record.

DELETE Record — sample query

CREATE TABLE tags (id INTEGER PRIMARY KEY, label TEXT);
INSERT INTO tags VALUES (1, 'old'), (2, 'keep');
DELETE FROM tags WHERE label = 'old';
SELECT * FROM tags;

DELETE Record — dELETE removes matching rows. TRUNCATE clears a whole table faster (MySQL).

Short notes

DefDELETE Record — Ananya uses it for DELETE Record on Ananya's board in lab hour.
RuleDELETE Record → one DELETE Record step Ananya can write from memory.
RememberDELETE Record + the query planner (lab hour).
UseDELETE Record in lab hour (DELETE Record on Ananya's board).
TrapDELETE Record — only reciting the name of DELETE Record.
ExDELETE Record → DELETE Record on Ananya's board.

DELETE Record

DELETE Record — sample query

Short notes

Questions

DELETE Record

DELETE Record — sample query

Short notes

Questions