SQL · Theory

Rename Column

Theory

25/439

Rename Column

Sara only reaches for Rename Column when Sara walking through Rename Column has to stay correct in a campus project.

Rename Column order: meaning → one Rename Column step Sara can write from memory → one limit. Dumping ten features helps nobody.

Skip Rename Column and skipping the failure case for Rename Column shows up in a campus project.

Use Rename Column when Sara walking through Rename Column must stay clear. If a simpler SQL step works, use that instead.

Don’t do this with Rename Column — skipping the failure case for Rename Column. Interviewers spot it in ten seconds.

After Rename Column, Sara should still remember skipping the failure case for Rename Column.

Viva for Rename Column: what it is → one Rename Column step Sara can write from memory → the mistake (skipping the failure case for Rename Column).

Exam tip

For Rename Column: definition + a campus project + one failure.

Rename Column — sample query

CREATE TABLE items (id INTEGER PRIMARY KEY, title TEXT);
ALTER TABLE items ADD COLUMN price REAL DEFAULT 0;
INSERT INTO items (id, title, price) VALUES (1, 'Pen', 10);
SELECT * FROM items;

Rename Column — aLTER TABLE changes structure without rebuilding the whole table.

Short notes

DefRename Column — Sara uses it for Sara walking through Rename Column in a campus project.
RuleRename Column → one Rename Column step Sara can write from memory.
RememberRename Column + the query planner (a campus project).
UseRename Column in a campus project (Sara walking through Rename Column).
TrapRename Column — skipping the failure case for Rename Column.
ExRename Column → Sara walking through Rename Column.

SQL · Theory

Rename Column

← All stacks

Theory

25/439

Rename Column

Sara only reaches for Rename Column when Sara walking through Rename Column has to stay correct in a campus project.

Rename Column order: meaning → one Rename Column step Sara can write from memory → one limit. Dumping ten features helps nobody.

Skip Rename Column and skipping the failure case for Rename Column shows up in a campus project.

Use Rename Column when Sara walking through Rename Column must stay clear. If a simpler SQL step works, use that instead.

Don’t do this with Rename Column — skipping the failure case for Rename Column. Interviewers spot it in ten seconds.

After Rename Column, Sara should still remember skipping the failure case for Rename Column.

Viva for Rename Column: what it is → one Rename Column step Sara can write from memory → the mistake (skipping the failure case for Rename Column).

Exam tip

For Rename Column: definition + a campus project + one failure.

Rename Column — sample query

CREATE TABLE items (id INTEGER PRIMARY KEY, title TEXT);
ALTER TABLE items ADD COLUMN price REAL DEFAULT 0;
INSERT INTO items (id, title, price) VALUES (1, 'Pen', 10);
SELECT * FROM items;

Rename Column — aLTER TABLE changes structure without rebuilding the whole table.

Short notes

DefRename Column — Sara uses it for Sara walking through Rename Column in a campus project.
RuleRename Column → one Rename Column step Sara can write from memory.
RememberRename Column + the query planner (a campus project).
UseRename Column in a campus project (Sara walking through Rename Column).
TrapRename Column — skipping the failure case for Rename Column.
ExRename Column → Sara walking through Rename Column.

Rename Column

Rename Column — sample query

Short notes

Questions

Rename Column

Rename Column — sample query

Short notes

Questions