how to get all column names in sql code example

Example 1: get table columns from sql

SELECT *
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_NAME = N'Customers' 
-- INFORMATION_SCHEMA is an ANSI-standard (American National Standard Institute) set of read-only views which provide information about all of the tables, views, columns, and procedures in a database
-- "N" defines the subsequent string (the string after the N) as being in unicode

Example 2: get column name sql server

SELECT *
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = N'Customers'

Example 3: How to View column names of a table in SQL

DESCRIBE Table_Name;

OR 

DESC Table_Name;