Query script error

ERPNext Reports
1

Hi Team,
Please help correct my below simple query in report, which is giving me syntax error, am i silly here:
SELECT max(total)
FROM ‘tabsales invoice’ WHERE posting_date = curdate()

Thanks.

2

Please apply it.

SELECT max(total)
FROM `tabSales Invoice` 
WHERE posting_date = CURDATE();

Another reference: Stock report issue - #4 by NCP

3

Thanks buddy.