# Difference between revisions of "Select the oldest person"

How can I select the oldest person in the table PERSON by birthday?

schema:gisq

I have a table

PERSON(personID, name, sex, birthday, placeOfBirth)

Now I would like to SELECT the oldest person in the table by birthday.

Answer: Use a nested query to find the earliest birthday.

```
```
```
```
```-- Set up the problem
DROP TABLE people;
CREATE TABLE people(personId INTEGER PRIMARY KEY,
name VARCHAR(20),
sex CHAR(1),
birthday DATE,
placOfBirth VARCHAR(20));
INSERT INTO people VALUES
(1,'Oliver','M','25 May 1985','Bedford');
INSERT INTO people VALUES
(2,'Andrew','M','20 May 1962','Hong Kong');

SELECT * FROM people
WHERE birthday = (SELECT MIN(birthday) FROM people)
```
```-- Set up the problem
DROP TABLE people;
CREATE TABLE people(personId INTEGER PRIMARY KEY,
name VARCHAR(20),
sex CHAR(1),
birthday DATE,
placOfBirth VARCHAR(20));
INSERT INTO people VALUES
(1,'Oliver','M','25 May 1985','Bedford');
INSERT INTO people VALUES
(2,'Andrew','M','20 May 1962','Hong Kong');

SELECT * FROM people
WHERE birthday = (SELECT MIN(birthday) FROM people)
```
```-- Set up the problem
DROP TABLE people;
CREATE TABLE people(personId INTEGER PRIMARY KEY,
name VARCHAR(20),
sex CHAR(1),
birthday DATE,
placOfBirth VARCHAR(20));
INSERT INTO people VALUES
(1,'Oliver','M','25 May 1985','Bedford');
INSERT INTO people VALUES
(2,'Andrew','M','20 May 1962','Hong Kong');

SELECT * FROM people
WHERE birthday = (SELECT MIN(birthday) FROM people)
```
```-- Set up the problem
DROP TABLE people;
CREATE TABLE people(personId INTEGER PRIMARY KEY,
name VARCHAR(20),
sex CHAR(1),
birthday DATE,
placOfBirth VARCHAR(20));
INSERT INTO people VALUES
(1,'Oliver','M','25 May 1985','Bedford');
INSERT INTO people VALUES
(2,'Andrew','M','20 May 1962','Hong Kong');

SELECT * FROM people
WHERE birthday = (SELECT MIN(birthday) FROM people)
```
```-- Set up the table
DROP TABLE people;
CREATE TABLE people(personId INTEGER PRIMARY KEY,
name VARCHAR(20),
sex CHAR(1),
birthday DATE,
placOfBirth VARCHAR(20));
INSERT INTO people VALUES
(1,'Oliver','M','1985-05-25','Bedford');
INSERT INTO people VALUES
(2,'Andrew','M','1962-05-20','Hong Kong');

SELECT * FROM people
ORDER BY birthday ASC
LIMIT 1
```
```-- Set up the problem
DROP TABLE people;
CREATE TABLE people(personId INTEGER PRIMARY KEY,
name VARCHAR(20),
sex CHAR(1),
birthday DATE,
placOfBirth VARCHAR(20));
INSERT INTO people VALUES
(1,'Oliver','M','25 May 1985','Bedford');
INSERT INTO people VALUES
(2,'Andrew','M','20 May 1962','Hong Kong');