I like to insert total doctors in a department by getting a value from doctor table

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SQL-Server-2014

I like to insert total doctors in a department by getting a value from doctor table.

What I have tried:

Insert into Department (Total_Doctor)
values (( Select Count(*) from department Dep, Doctor do
Where Dep.De_ID = Do.De_ID
Group by Dep.Name
));
Error:
Sub query returned more than 1 value.
This is not premitted when the subquery follows =, != ,< <=, >, >= or when the subquery is used as an expression

Posted 26-Jul-18 18:57pm

AbdulMujeeb2011

Updated 26-Jul-18 19:46pm

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OriginalGriff · Accepted Answer · 2018-07-26T19:47:00

Your inner query:

Select Count(*) from department Dep, Doctor do
Where Dep.De_ID = Do.De_ID
Group by Dep.Name

Returns more than one row, because it is a GROUP BY query and that is what it is supposed to do!

But the outer query expects only one value, so you get an error.
Look at using INSERT INTO SELECT Statement[^] instead.