Question

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Subtraction in sql statement

I have a table with Presidents names and I want to count how many (distinct presidents) served for over 4 years.

So I wrote the following query however it doesn’t work. Error is:

Invalid query: You have an error in your SQL syntax, near '*) FROM
(SELECT DISTINCT P1.firstName, P1.lastName FROM Presidents P1 ' at
line 1

Query is:

SELECT COUNT (*)
FROM (SELECT DISTINCT P1.firstName, P1.lastName
      FROM Presidents P1
      WHERE (P1.endTerm - P1.beginTerm) > 4) M;

Anyone see the syntax error?

thanks!

Answer 1

Just remove the space between COUNT and (*)

or even better rewrite query to:

SELECT COUNT(DISTINCT P1.firstName, P1.lastName)
      FROM Presidents P1
      WHERE (P1.endTerm - P1.beginTerm) > 4