Question

What is POPULAR today when it comes to write SQL Queries: UPPER CASE or Lower Case? And for what specific reason?

SELECT * FROM tMyTable 

Or

Select * from tMytable

Answer 1

Either. Just be consistent

Personally…

Keywords uppercase for me, objects and datatypes in Normal or CapsCase.

SELECT 
    M.Column1,
    CAST(O.Column2 AS int) AS IntColumn
FROM
    MyTable M
    JOIN
    OtherTable O ON M.SomeKey = O.SomeKey 
WHERE
    M.Column3 = 'bar'
ORDER BY
    M.Column1

It’s easier to pick out the clauses of a complete SELECT query this way