SQL-使用COUNT查询出现问题

Question

Good day again to all SQL guru here :)

I have a problem querying my table using COUNT.

This is the data inside of the table (tblstudentoffense)

And this is the RESULT that I want (Let's say that there is a new column after the offenseType that will count the Stealing and Gaming Offense

Is this possible? If possible kindly add an explanation with your provided code. Thanks :)

Answer 1

Using subquery to get count and concatenate count with main select statement

SELECT DISTINCT OffenseType + ' ' + CAST(B.Cnt AS VARCHAR) ,  
Othercolumn1,Othercolumn2
FROM Your_tableName A
JOIN 
(
  SELECT COUNT(*) Cnt , StudentId
  FROM Your_tableName
  GROUP BY StudentId 
) B ON B.StudentId = A.StudentId

Answer 2

Try using CONCAT_WS() .The CONCAT_WS() function is used to join two or more strings with a separator.

Note: offensetypeCount is an new column having expected output.

SELECT *,CONCAT_WS(' ',offensetype,count(offenseType) AS offensetypeCount FROM tblstudentoffense GROUP BY offensetype;

Answer 3

Is this what you are looking for:

 WITH SRC AS  
    (SELECT 'STEALING' OFFENSETYPE,'1' STUDENTID FROM DUAL UNION ALL 
     SELECT 'STEALING' OFFENSETYPE,'1' STUDENTID FROM DUAL UNION ALL
     SELECT 'STEALING' OFFENSETYPE,'1' STUDENTID FROM DUAL UNION ALL
     SELECT 'STEALING' OFFENSETYPE,'1' STUDENTID FROM DUAL UNION ALL
     SELECT 'GAMING' OFFENSETYPE,'1' STUDENTID FROM DUAL UNION ALL)  
     SELECT OFFENSETYPE,STUDENTID,COUNT(*) FROM SRC GROUP BY OFFENSETYPE,STUDENTID;

Answer 4

You could try

SELECT CONCAT(offensetype, ' ', COUNT(offensetype)) AS offenseType, 
       studentid, 
       offenseln, 
       offensefn, 
       offensemn, 
       offensesuffixname 
FROM   tblstudentoffense
GROUP  BY offensetype, 
          studentid, 
          offenseln, 
          offensefn, 
          offensemn, 
          offensesuffixname; 

I've created a sample at this link http://rextester.com/WZGW41761 .