SQL · Theory

Date and Time Literals

Theory

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Date and Time Literals

Date and Time Literals is simple if you keep it on paper. Priya uses it for a Date and Time Literals dry-run in a viva board.

Date and Time Literals order: meaning → one Date and Time Literals step Priya can write from memory → one limit. Dumping ten features helps nobody.

Without Date and Time Literals, a viva board gets messy and a Date and Time Literals dry-run is hard to trust.

Use Date and Time Literals when a Date and Time Literals dry-run must stay clear. If a simpler SQL step works, use that instead.

Date and Time Literals trap: skipping the failure case for Date and Time Literals. Priya loses marks for that every viva.

Place Date and Time Literals next to nearby SQL work — one Date and Time Literals step Priya can write from memory is the link.

One breath for Date and Time Literals, then a Date and Time Literals dry-run, then skipping the failure case for Date and Time Literals. Sit down.

Exam tip

Board: a Date and Time Literals dry-run. Dry-run Date and Time Literals. Name the trap: skipping the failure case for Date and Time Literals.

Date and Time Literals — sample query

CREATE TABLE products (id INTEGER PRIMARY KEY, name TEXT, price REAL);
INSERT INTO products VALUES (1, 'Pen', 10), (2, 'Book', 200), (3, 'Bag', 50);
SELECT * FROM products
WHERE price BETWEEN 20 AND 150 AND name LIKE 'B%';

Date and Time Literals — wHERE combines predicates with AND/OR; LIKE does pattern match.

Short notes

DefDate and Time Literals — Priya uses it for a Date and Time Literals dry-run in a viva board.
RuleDate and Time Literals → one Date and Time Literals step Priya can write from memory.
RememberDate and Time Literals + the query planner (a viva board).
UseDate and Time Literals in a viva board (a Date and Time Literals dry-run).
TrapDate and Time Literals — skipping the failure case for Date and Time Literals.
ExDate and Time Literals → a Date and Time Literals dry-run.

CREATE TABLE products (id INTEGER PRIMARY KEY, name TEXT, price REAL); INSERT INTO products VALUES (1, 'Pen', 10), (2, 'Book', 200), (3, 'Bag', 50); SELECT * FROM products WHERE price BETWEEN 20 AND 150 AND name LIKE 'B%';

Date and Time Literals

Date and Time Literals — sample query

Short notes

Questions

Date and Time Literals

Date and Time Literals — sample query

Short notes

Questions