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A query (any query) can return a maximum of 255 columns (fields). The crosstab wizard may limit you to 3 row headers (3 field columns) but. you can put in many more. There is not a way to change the maximum number of columns. You can. sub-divide the columns you want to return into two queries by.
E.g. This gives you the number of columns in that table. Together with this you would need to use a cursor, i think, to check each column for null values rather than adding a null check in WHERE clause for each column. share | improve this answer.o want to check for each row in the table, how many columns are null or do you want to know which columns of the table contains ONLY null values in all rows? â Daniel Hilgarth Jun 9 '11 at 10:10.