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PL/SQL Interview

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PL/SQL Interview

PL/SQL Interview is simple if you keep it on paper. Isha uses it for a fail-list view in teachers’ report.

PL/SQL Interview on the board — CREATE VIEW fail_list AS …. Then say what a fail-list view looks like after.

Skip PL/SQL Interview and trying to UPDATE a non-updatable view shows up in teachers’ report.

Isha ships PL/SQL Interview in teachers’ report. That is the use case worth saying.

Don’t do this with PL/SQL Interview — trying to UPDATE a non-updatable view. Interviewers spot it in ten seconds.

PL/SQL Interview is not a lonely heading. Isha ties it to a fail-list view.

Close PL/SQL Interview with: “If I skip it, a fail-list view goes wrong like this: trying to UPDATE a non-updatable view.”

Exam tip

Say PL/SQL Interview in one breath, then CREATE VIEW fail_list AS …, then trying to UPDATE a non-updatable view.

PL/SQL Interview — sample query

-- PL/SQL Interview
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;

PL/SQL Interview: create two demo rows, then SELECT qty >= 2 ordered. Say which labels come back.

Short notes

DefPL/SQL Interview — Isha uses it for a fail-list view in teachers’ report.
RulePL/SQL Interview → CREATE VIEW fail_list AS ….
RememberPL/SQL Interview + an index (teachers’ report).
UsePL/SQL Interview in teachers’ report (a fail-list view).
TrapPL/SQL Interview — trying to UPDATE a non-updatable view.
ExPL/SQL Interview → a fail-list view.

-- PL/SQL Interview 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;

PL/SQL Interview

PL/SQL Interview — sample query

Short notes

Questions

PL/SQL Interview

PL/SQL Interview — sample query

Short notes

Questions