limit -20, 20 -1064 Fehler bei Adminbereich

[sharepoint]

Ich habe folgenden Problemen in Adminbereich.
Produktbewertungen
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-20, 20' at line 1

select reviews_id, products_id, date_added, last_modified, reviews_rating from reviews order by date_added DESC limit -20, 20

Meistbesuchte Artikel
XT Statistics
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-20, 20' at line 1

select p.products_id, pd.products_name, pd.products_viewed, l.name from products p, products_description pd, languages l where p.products_id = pd.products_id and l.languages_id = pd.language_id order by pd.products_viewed DESC limit -20, 20

[XT SQL Error]

Kreditkarten-Blackliste
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-20, 20' at line 1

select blacklist_id, blacklist_card_number, date_added, last_modified from card_blacklist order by blacklist_id limit -20, 20

[XT SQL Error]

Meistverkaufte Artikel
XT Statistics
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-20, 20' at line 1

select p.products_id, p.products_ordered, pd.products_name from products p, products_description pd where pd.products_id = p.products_id and pd.language_id = '2' and p.products_ordered > 0 group by pd.products_id order by p.products_ordered DESC, pd.products_name limit -20, 20

[XT SQL Error]

Bestellungen
Bestell-Nr.:
XT Customers
Status:
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-20, 20' at line 1

select o.orders_id, o.customers_name, o.payment_method, o.date_purchased, o.last_modified, o.currency, o.currency_value, s.orders_status_name, ot.text as order_total from orders o left join orders_total ot on (o.orders_id = ot.orders_id), orders_status s where o.orders_status = s.orders_status_id and s.language_id = '2' and ot.class = 'ot_total' order by o.orders_id DESC limit -20, 20

[XT SQL Error]
Bitte, helfen Sie mir , wie kann man diese Probleme l?sen?