SQL · Theory

Rename Table

Theory

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Rename Table

Rename Table is simple if you keep it on paper. Ananya uses it for Ananya walking through Rename Table in a first job task.

Rename Table on the board: one Rename Table step Ananya can write from memory. Then say what Ananya walking through Rename Table looks like after.

Without Rename Table, a first job task gets messy and Ananya walking through Rename Table is hard to trust.

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

If Ananya walking through Rename Table breaks under Rename Table, check copy-pasting Rename Table without a dry-run first.

Place Rename Table next to nearby SQL work — one Rename Table step Ananya can write from memory is the link.

One breath for Rename Table, then Ananya walking through Rename Table, then copy-pasting Rename Table without a dry-run. Sit down.

Exam tip

Board: Ananya walking through Rename Table. Dry-run Rename Table. Name the trap: copy-pasting Rename Table without a dry-run.

Rename Table — sample query

-- Rename Table
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;

Rename Table: create two demo rows, then SELECT qty >= 2 ordered. Say which labels come back.

Short notes

DefRename Table — Ananya uses it for Ananya walking through Rename Table in a first job task.
RuleRename Table → one Rename Table step Ananya can write from memory.
RememberRename Table + an index (a first job task).
UseRename Table in a first job task (Ananya walking through Rename Table).
TrapRename Table — copy-pasting Rename Table without a dry-run.
ExRename Table → Ananya walking through Rename Table.

-- Rename Table 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;

Rename Table

Rename Table — sample query

Short notes

Questions

Rename Table

Rename Table — sample query

Short notes

Questions