This section is not intended to be a course in the SQL language. Hence, the focus will be put on the minimal set of differences that you must know in order to write queries properly.

...

On the other hand aliases of column and table names must be surrounded by accent characters.

SELECT
 'This is a string' as `Column Alias` 
 FROM 
  DUAL `Table alias`

...

Image Added

Show tables and columns

Run

...

select * from PROJECT

will work.

Whereas

select * from project

will not.

...

No schema names

Many database vendors group their tables into schemas (i.e.: PUBLIC). SQL Cloud does not support them.

...

SELECT `i`.`KEY`as `Issue`, count(*) as `Num. comments`
FROM ISSUE `i`
LEFT JOIN ISSUECOMMENT `ic` ON `ic`.`ISSUEID` = `i`.`ID`
WHERE `i`.`JQL` = 'PROJECT = TALH'
GROUP BY `i`.`KEY`
HAVING count(*) > 2

Works!

In this query the condition has been modified to uses column aliases: `Num. comments` > 2

SELECT `i`.`KEY`as `Issue`, count(*) as `Num. comments`
FROM ISSUE `i`
LEFT JOIN ISSUECOMMENT `ic` ON `ic`.`ISSUEID` = `i`.`ID`
WHERE `i`.`JQL` = 'PROJECT = TALH'
GROUP BY `i`.`KEY`
HAVING `Num. comments` > 2

Not works!