Insert into table with multiple values in subquery

Question

INSERT INTO Reference_TB] ([RequestID] ,[WaveID]) 
VALUES (2222,(select tWaveID from @Table2))

I am using above query to insert into table. I know @Table2 has multiple tWaveID and that's why it is showing error :

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

How to resolve that and insert twaveID repeating RequestID as 2222 for all entries?

Answer 1

Use the INSERT ... SELECT statement instead of a subquery:

INSERT INTO Reference_TB] ([RequestID] ,[WaveID]) 
(select 2222, tWaveID from @Table2)