I have a project I want to get data from a specific column from table one and insert those data by id to the specific column in table 2 what query could I use? how to get data from specific column from table 1 to a specific column to table 2
here's my Repository
#Query(value = "SELECT :refId FROM product WHERE id = :id", nativeQuery=true)
public String findReferenceid(#Param(value = "id") long id, #Param(value = "refId") String refId);
Thanks.
Related
I have a table which contains a employee ID and a database ID code in database DBX0 table 'FirstTable':
Employee ID
Database ID
123
1
456
2
789
2
149
3
The database name is stored in a different table 'databases' like :
Database ID
DB name
1
DBX1
2
DBX2
3
DBX3
So what I'm trying to do is join the first table with a separate table which is stored in the identified database, like
SELECT * from DBX0.dbo.FirstTable a join (SELECT [DB name] from DBX0.dbo.databases where [database ID] = a.[database ID]).dbo.OtherTable
(I don't think this will actually work with a subquery, but this would return the result that I want in theory.)
I have tried dynamic sql with a cursor to iterate through each database and then only return results based on database ID = database ID and Employee ID = Employee ID, but this returns the results in a separate result per database.
Also tried:
Select * from (SELECT * from DBX0.dbo.FirstTable a join '+#dbname+'.dbo.OtherTable on a.employeeid = b.employeeid and a.dbid = b.dbid)
in dynamic sql, but this didn't work either.
Is there any way to get all of the data in one result?
I have a column on my table called RecordId. I want to duplicate this column to a column named BookId. I know I can add column like this:
ALTER TABLE products ADD COLUMN BookId;
But how do I populate the value from the other column?
UPDATE products
SET BookId = RecordId
WHERE RecordId > 0
I have a scenario where I need to fetch list of string values from a table.
I need to query the Subject table and get list of subjects:
EmployeeDetails emp = new EmployeeDetails();
emp.subjects = from x in EmpDB.subjects
join y in EmpDB.employeeInfo
on x.subjectCode equals y.subjectCode select new
{
x.subjectTitle,
}.toList();
I have an employee ID which I need to query the EmployeeDetails table and get SubjectCodes of that particular Employee ID, and using those subject codes, I need to query the Subject table and get the subject values.
I assume that in EmployeeDetails class you have property Subjects with List.
EmployeeDetails emp = new EmployeeDetails();
emp.subjects = (from x in EmpDB.subjects
join y in EmpDB.employeeInfo on x.subjectCode equals y.subjectCode
where y.EmployeeId = <<your ID>> // Employee ID you searching
select x.subjectTitle).ToList();
Imagine you have two tables:
Table User:
ID, Name
Table Orders:
ID, UserID
I'm trying to create a new column in table User which should contain aggregated values of distinct count of Order.IDs.
Calculated column:
OrderCount = CALCULATE(DISTINCTCOUNT(Orders[Id]))
Alternatively if you don't/can't have a relationship between the two tables:
OrderCount2 = CALCULATE(DISTINCTCOUNT(Orders[Id]),FILTER(Orders, Orders[UserId] = User[Id]))
If all you need is to display it in some visualisation, you can use Orders[Id] directly by setting the aggregate option to Count (Distinct) in Values under Visualizations side pane.
I have recently started using Entity Framework and have run into a problem.
I have 2 simple tables mapped with Entity Framework in my solution:
Employees:
emp_id INT
first_name VARCHAR
last_name VARCHAR
department INT ( FOREIGN KEY MAPPED TO departments.dept_id )
and
Departments:
dept_id INT
department_name VARCHAR
Using the code below, I want to write to the database.
var record = db.employees.Create();
string test = "test";
record.first_name = test;
record.last_name = test;
record.department = 1;
db.employees.Add(record);
db.SaveChanges();
I get an error the error:
Entities in "'DBContextContainer.employees' participate in the 'employeedepartment' relationship. 0 related 'department' were found. 1 'department' is expected."
at the db.SaveChanges() method. Can someone please explain to me how I could resolve or troubleshoot this?
Update: There is a record in the departments table with a dept_id of 1 and I am still getting the error.
You'll need to add a field to the Departments table first since Departments is the parent table (Employees depend on Departments as per your table structure). You cant add an employee with department that doesn't have a corresponding entry in the Departments table.