Counting null and non-null values in a single query

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星月不相逢
星月不相逢 2021-01-29 19:31

I have a table

create table us
(
 a number
);

Now I have data like:

a
1
2
3
4
null
null
null
8
9

Now I need

26条回答
  •  醉梦人生
    2021-01-29 19:47

    Here are two solutions:

    Select count(columnname) as countofNotNulls, count(isnull(columnname,1))-count(columnname) AS Countofnulls from table name
    

    OR

    Select count(columnname) as countofNotNulls, count(*)-count(columnname) AS Countofnulls from table name
    

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