Oracle show column of table

Column names in oracle sql

DESCRIBE Table_Name;

OR 

DESC Table_Name;

Oracle show column of table

SELECT column_name
  FROM all_tab_cols
 WHERE table_name = 'USERS'
   AND owner = '" +_db+ "'
   AND column_name NOT IN ( 'PASSWORD', 'VERSION', 'ID' )

Source: stackoverflow.com

Oracle show column of table

-- Depending on schema grants:
SELECT * FROM USER_TAB_COLS WHERE TABLE_NAME = 'my_table';	-- User tables
SELECT * FROM ALL_TAB_COLS WHERE TABLE_NAME = 'my_table';	-- Access granted
SELECT * FROM DBA_TAB_COLS WHERE TABLE_NAME = 'my_table';	-- All schemas

-- Columns from all tables in a schema (or USER_..., DBA_... instead of ALL_...):
SELECT c.TABLE_NAME, c.DATA_TYPE FROM ALL_TAB_COLS c
JOIN ALL_TABLES t ON t.OWNER = c.OWNER
WHERE OWNER = 'my_schema';

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