SQL

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

How to select all columns in table in SQL

-- You can select data from a table using a SELECT statement.
-- Select all columns from table:
SELECT *
FROM example_table;

select all column

SELECT * FROM MyTable WHERE COLLATE(Col1, Col2, Col3, Col4......) IS NULL

select all columns of a table

select * from <table-name>;