Q:

can i combine these update queries into one query

In an MS-Access database with Table called NewTable3
can i combine these 3 sql queries into one query
UPDATE NewTable3 SET SAO = '0' WHERE SAO LIKE '-';
UPDATE NewTable3 SET SAO = '0' WHERE SAO LIKE 'NULL';
UPDATE NewTable3 SET SAO = '0' WHERE SAO LIKE 'NA';

A:

What about using OR?
UPDATE NewTable3 
SET SAO = '0' 
WHERE (WAP LIKE '-') OR (WAP IS NULL) OR (WAP LIKE 'NA');

You can learn more about using AND and OR in SQL queries here.
The original question included the condition WAP LIKE 'NULL'. The correct notation is WAP IS NULL" and not WAP LIKE 'NULL'; Null isn't the text NULL but a special, none-textual value.

A:

UPDATE NewTable3 
SET SAO = '0' 
WHERE (WAP LIKE '-') OR (WAP IS NULL) OR (WAP LIKE 'NA');

