how do i use conditional statement in sql? im using access 2003 as frontend and backend.
What would be the SQL statement for the situation below?
I would like to count the number of records in a table (ex. ENROLL) where there is only 1 instance of any value in a field (ex. STUDENT_NO) plus another condition where a given value (ex. 1) should exist in another field (ex. SECTION).
Example
Table name: ENROLL
STUDENT_NO SECTION FEE
16 ------------------ 1 -------- 75
16 ------------------ 2 -------- 75
17 ------------------ 1 -------- 100
18 ------------------ 2 -------- 125
19 ------------------ 1 -------- 75
19 ------------------ 2 -------- 75
19 ------------------ 3 -------- 75
20 ------------------ 1 -------- 150
Parameters:
COUNT
The number of records (count) in the table where there is only one instance of the STUDENT_NO value and the corresponding SECTION value is 1
VALUE
The sum of the FEE values in the table where there is only one instance of the STUDENT_NO value and the corresponding SECTION value is 1
The answer should come out like this:
count = 2
value = 250
5  2415  
how do i use conditional statement in sql? im using access 2003 as frontend and backend.
What would be the SQL statement for the situation below?
I would like to count the number of records in a table (ex. ENROLL) where there is only 1 instance of any value in a field (ex. STUDENT_NO) plus another condition where a given value (ex. 1) should exist in another field (ex. SECTION).
Example
Table name: ENROLL
STUDENT_NO SECTION FEE
16 ------------------ 1 -------- 75
16 ------------------ 2 -------- 75
17 ------------------ 1 -------- 100
18 ------------------ 2 -------- 125
19 ------------------ 1 -------- 75
19 ------------------ 2 -------- 75
19 ------------------ 3 -------- 75
20 ------------------ 1 -------- 150
Parameters:
COUNT
The number of records (count) in the table where there is only one instance of the STUDENT_NO value and the corresponding SECTION value is 1
VALUE
The sum of the FEE values in the table where there is only one instance of the STUDENT_NO value and the corresponding SECTION value is 1
The answer should come out like this:
count = 2
value = 250
- SELECT Count(*) As Count, Sum([Fee]) As Value
-
FROM [Table Name]
-
WHERE ((DCount("*", "[Table Name]", "STUDENT_NO = " & STUDENT_NO) = 1) AND (SECTION = 1));
- SELECT Count(*) As Count, Sum([Fee]) As Value
-
FROM [Table Name]
-
WHERE ((DCount("*", "[Table Name]", "STUDENT_NO = " & STUDENT_NO) = 1) AND (SECTION = 1));
Thanks very much, Rabbit. That solve it when the STUDENT_NO data type is a number. I am getting an error because the data type for the STUDENT_NO field is text.
If it's text then use: - SELECT Count(*) As Count, Sum([Fee]) As Value
-
FROM [Table Name]
-
WHERE ((DCount("*", "[Table Name]", "STUDENT_NO = '" & STUDENT_NO & "'") = 1) AND (SECTION = 1));
Thanks again, Rabbit. You're great!!! I got it working now.
Not a problem, good luck.
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