sql get columns from table 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: sql all columns
-- MySQL
SELECT *
FROM INFORMATION_SCHEMA.COLUMNS;
-- SQL Server (possible solution)
SELECT *
FROM SYS.COLUMNS;
-- Oracle
SELECT *
FROM ALL_TAB_COLS; -- (If you only want user-defined columns)
-- ALL_TAB_COLS : only user-defined columns
-- ALL_TAB_COLUMNS : both user-defined AND system columns