How to update multiple rows in SQL Server? - sql-server

Question

Here is the Insert into select query which selects multiple rows from GradePackages table and inserts the data into EmployeePackages table:
insert into EmployeePackages (EmployeeId, GradeId, PackageId, Amount)
select
#EmployeeId,
#GradeId,
PackageId,
Amount
from
GradePackages
where
GradeId = #GradeId
Here #EmployeeId and GradeId have a single value each. But PackageId and Amount, each of them have 5 values.
The Insert query works fine, but the problem is with the update query. I need to update i.e. copy rows from the GradePackages table (where I input a specific GradeId) into the EmployeePackages table (where specific EmployeeId is input). I know it will work on a single row but there are multiple rows and that is the problem. I have tried different types of Update queries but it doesn't work. Have a look please. Thank you.
EmployeePackages table:
Id
EmployeeId
GradeId
PackageId
Amount
13
1036
30
1
29980.00
14
1036
30
2
5000.00
15
1036
30
3
0.00
16
1036
30
4
0.00
17
1036
30
5
0.00
18
1037
31
1
34000.00
19
1037
31
2
6000.00
20
1037
31
3
0.00
21
1037
31
4
0.00
22
1037
31
5
0.00
GradePackages table:
Id
GradeId
PackageId
Amount
11
30
1
34650.00
12
30
2
5000.00
13
30
3
0.00
14
30
4
0.00
15
30
5
0.00
16
29
1
41090.00
17
29
2
6000.00
18
29
3
0.00
19
29
4
0.00
20
29
5
0.00
Output needed (EmployeePackages):
Id
EmployeeId
GradeId
PackageId
Amount
13
1036
29
1
41090.00
14
1036
29
2
6000.00
15
1036
29
3
0.00
16
1036
29
4
0.00
17
1036
29
5
0.00
18
1037
31
1
34000.00
19
1037
31
2
6000.00
20
1037
31
3
0.00
21
1037
31
4
0.00
22
1037
31
5
0.00
Expected results:
Let's say I select rows with GradeId = 29 (5 rows) from GradePackages and update EmployeePackages where EmployeeId = 1036

Answer 1

I believe you said Update; not insert so...
DECLARE #GradeID AS Numeric(4,0)=29
DECLARE #EmployeeID as Numeric(4,0)=1036
UPDATE EmployeePackages
SET EmployeePackages.Amount = GP.Amount,
EmployeePackages.GradeID = #GradeID --added this and , above.
FROM EmployeePackages EP
INNER JOIN GradePackages GP
ON EP.PackageID = GP.PackageID
WHERE EP.EmployeeID = #EmployeeID
AND GP.GradeID = #GradeID
Consider:
Parameterizing SQL UPDATE query
SQL Update from One Table to Another Based on a ID Match
Example Fiddle: Special thanks to RF1991 so I didn't have to re-create the fiddle.
Resulting in:
+---------+------------+---------+-----------+----------+
| Id | EmployeeId | GradeId | PackageId | Amount |
+---------+------------+---------+-----------+----------+
| 13 | 1036 | 29 | 1 | 41090.00 |
| 14 | 1036 | 29 | 2 | 6000.00 |
| 15 | 1036 | 29 | 3 | 0.00 |
| 16 | 1036 | 29 | 4 | 0.00 |
| 17 | 1036 | 29 | 5 | 0.00 |
| 18 | 1037 | 31 | 1 | 34000.00 |
| 19 | 1037 | 31 | 2 | 6000.00 |
| 20 | 1037 | 31 | 3 | 0.00 |
| 21 | 1037 | 31 | 4 | 0.00 |
| 22 | 1037 | 31 | 5 | 0.00 |
+---------+------------+---------+-----------+----------+

Answer 2

for update using Subquery
UPDATE employeepackages
SET employeepackages.gradeid = t.gradeid,
employeepackages.amount = t.amount
FROM (SELECT GP.gradeid,
GP.packageid,
GP.amount
FROM gradepackages GP
FULL JOIN employeepackages EP
ON EP.gradeid = GP.gradeid
AND EP.packageid = GP.packageid
WHERE EP.gradeid IS NULL) t
WHERE employeeid = #EmployeeId
AND employeepackages.gradeid = #GradeId
AND employeepackages.packageid = t.packageid
subquery fiddle
or with CTE
;with t as(
SELECT
GP.gradeid ,
GP.packageid ,
GP.amount
FROM gradepackages GP
FULL JOIN employeepackages EP
ON EP.gradeid = GP.gradeid
AND EP.packageid = GP.packageid
WHERE EP.gradeid IS NULL )
UPDATE e
SET e.gradeid = t.gradeid,
e.amount = t.amount
FROM employeepackages e
JOIN t
ON e.packageid = t.packageid
WHERE e.employeeid = #EmployeeId
AND e.GradeId = #GradeId
cte fiddle