查询在Access

Question

这里计数未在列中输入的值是表

CREATE TABLE STUDENT 
(
School_ID char(3), 
St_LastName char(15), 
St_FirstName char(15), 
St_DOB char(15), 
St_SS# char(15), 
St_Address char(15), 
St_City char(15), 
St_State char(2), 
st_Zip char(5), 
st_phone char(15) 
); 

我必须写查询：确定有多少学生没有一个电话。

我在ACCESS

SELECT STUDENT.School_ID 
FROM STUDENT 
WHERE STUDENT.st_phone NOT IN(SELECT STUDENT.st_phone, Count(STUDENT.st_phone) AS StudentWithNoPhone FROM STUDENT 
GROUP BY STUDENT.st_phone); 

写下面的查询，但它不工作。

Answer 1

SELECT STUDENT.School_ID 
FROM STUDENT 
WHERE STUDENT.st_phone IS NULL OR STUDENT.st_phone = '' 

或者我误解了你的问题？