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.

Show tables and columns

• show tables

• show columns from <table>

Expand
title Example
Code Block language sql show tables Run the statement above to list all the tables available in the database model Image Added And Code Block language sql show columns from <table> to display the column and their metadata of a given table: Image Added

Strings vs aliases

Like in the rest of the database implementations a string is enclosed between single quotes.

...

Expand
title Example
Code Block language sql SELECT 'This is a string' as `Column Alias` FROM DUAL `Table alias`

Show tables and columns

Run

show tables

to list all the tables available in the database model

...

show columns from <table>

to display the column and their metadata of a given table:

...

Table, column and function names are case sensitive (Uppercase)

...

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!