sql order columns code example

Example 1: sql query order

SQL order of execution defines the
execution order of clauses.

-Select
It starts execution with 
-from  (Choose and join tables to get base data)
after from
-where ( filters base data )
-group by (Aggregates base data)
-having (filters aggregated data)
-select (returns final data)
-order by (sorts the final data)
-limit (limits the returned data to a row count)

Only select and from are mandatory

Example 2: sql order columns

SELECT * FROM table_name ORDER BY col1 ASC;				-- ASCending is default
SELECT * FROM table_name ORDER BY col1 DESC;			-- DESCending
SELECT * FROM table_name ORDER BY col1 DESC, col2 ASC;	-- col1 DESC then col2 ASC