在选择列表中，列“ tbl_Stock.Item_Name”无效，因为它既不包含在聚合函数中，也不包含在GROUP BY子句中

Question

I have a database table named as tbl_stock.

eg:

Order_ID  Item_Name  Item_Stock  Item_Dispatched  Item_Avaliable 
........  .......... ..........  ...............  ..............
1           abc           10            2               8
2           abc           13            7               6
3           abc           23            10              13
4           xyz           43            12              31
5           xyz            4            1               3

I want to get an out put in gridview as shown below:

Item_Name  Item_Stock  Item_Dispatched  Item_Avaliable 
.........  ..........  ...............  ..............
abc           46            19              27
xyz           47            13              33

I want to calculate specific column values. While using the given below SQL query showing one error. The error is " Column 'tbl_Stock.Item_Name' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause. "

SQL :

SELECT DISTINCT Item_Name, 
COUNT(Item_Stock) AS Item_Stock, 
COUNT(Item_Dispatched) AS Item_Dispatched, 
COUNT(Item_Avaliable) AS Item_Avaliable 
FROM tbl_Stock

Answer 1

Add group by clause rather than distinct like:

SELECT Item_Name, 
SUM(Item_Stock) AS Item_Stock, 
SUM(Item_Dispatched) AS Item_Dispatched, 
SUM(Item_Avaliable) AS Item_Avaliable 
FROM tbl_Stock
GROUP BY Item_Name

It will group all your records by Item_Name and will do SUM on each and every column.

Answer 2

as the error says, add GROUP BY to calculate totals for each item

SELECT /*DISTINCT*/ Item_Name, 
SUM(Item_Stock) AS Item_Stock, 
SUM(Item_Dispatched) AS Item_Dispatched, 
SUM(Item_Avaliable) AS Item_Avaliable 
FROM tbl_Stock
GROUP BY Item_Name

also there will be no need in DISTINCT.

COUNT() function will return number or rows (3 for abc item in Item_Stock, Item_Dispatched and Item_Avaliable columns and 2 for xyz), so to get desired result change it and use SUM()