I only have MySQL installed right now but will these work fine when run in PgSQL, MS SQL, etc.?
SELECT MAX(field) as max_field FROM table
SELECT MIN(field) as max_field FROM table
SELECT SUM(field) as max_field FROM table
I only have MySQL installed right now but will these work fine when run in PgSQL, MS SQL, etc.?
SELECT MAX(field) as max_field FROM table
SELECT MIN(field) as max_field FROM table
SELECT SUM(field) as max_field FROM table
You could check for yourself, but aggregate functions are common across most, if not all, RDBMS:
You get the idea.
Yes, they work well in every database.
SELECT AVG(field) as max_field FROM table -- Work fine too
All *SQL RDBMSes are designed to be used with the SQL language. ALL of them. That's why they're called *SQL RDBMSes. Aggregate functions are part of standard SQL, and therefore usable wherever SQL is usable.