如何对所有列一起使用计数和不同

Question

I am getting error while executing the following query.

SELECT COUNT(distinct *) AS "total unique records" FROM table

Please help me to resolve this issue

Answer 1

Because * is not allowed there. If you want to do this, use a subquery:

select count(*)
from (select distinct t.*
      from t
     ) t;

Answer 2

You probably want :

select count(*)
from (select distinct t.*
      from table t
    ) t;

Answer 3

You should specify column's name, your query may contain more than one column.

Example: SELECT COUNT(distinct Row1) AS "total unique records" FROM Table

Answer 4

Use this code too count row

 SELECT COUNT(*) AS TotalRecords FROM table 

AND use that too count row and return order columns

 SELECT COUNT(*) OVER() AS TotalRecords,* FROM table