Breaking News: Grepper is joining You.com. Read the official announcement!

sql custom data types

Innocent Iguana answered on February 9, 2024 Popularity 8/10 Helpfulness 4/10

answer sql custom data types

sql custom data types

Comment

-- Create table with custom ENUM data type
CREATE TYPE mood AS ENUM ('happy', 'sad', 'angry', 'excited'); -- custom ENUM data type
CREATE TABLE person ( -- table creation
    id SERIAL PRIMARY KEY,
    name VARCHAR(100),
    current_mood mood
);
INSERT INTO person (name, current_mood) VALUES ('Alice', 'happy'); -- data insertion

-- Create other custom data type
CREATE TYPE phone_number AS ( -- custom type
    country_code text,
    area_code text,
    number text
);
CREATE TABLE contacts ( -- creating table
    contact_id serial PRIMARY KEY,
    name text,
    phone phone_number
);
INSERT INTO contacts (name, phone) VALUES   -- data insertion
  ('John Doe', ROW('1', '555', '1234567')),
  ('Jane Smith', ROW('1', '555', '9876543'));

SELECT name, (phone).number AS number -- query table with custom data type 
FROM contacts;

-- See user defined data types
SELECT typname, typcategory
FROM pg_type

-- See using information schema
SELECT COLUMN_NAME,
       DATA_TYPE,
       UDT_NAME,
       IS_NULLABLE,
       CHARACTER_MAXIMUM_LENGTH,
       NUMERIC_PRECISION,
       NUMERIC_SCALE
FROM INFORMATION_SCHEMA.COLUMNS -- INFORMATION_SCHEMA.TABLES for table information
WHERE TABLE_NAME='your_table_name';

Popularity 8/10 Helpfulness 4/10 Language sql

Source: Grepper

Tags: sql

Link to this answer
Share Copy Link

Contributed on Feb 09 2024

Innocent Iguana

0 Answers Avg Quality 2/10

sql custom data types

Contents

More Related Answers

sql custom data types

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.