SQL Server : procedure tables cannot insert value null - sql

Question

I want to add 100 storages in a table.
This is my procedure:
CREATE PROCEDURE [add100*sTORAGE]
AS
DECLARE #i int, #start DATETIME, #end DATETIME
SET #start = GETDATE()
SET #i = 1
WHILE #i < 101
BEGIN
INSERT INTO Storage(storage_name)
VALUES (CONCAT('Nume', CONVERT(nvarchar, #i)))
SET #i = #i +1
END
SET #end = GETDATE()
DECLARE #testID INT = (SELECT TOP 1 (TestRunID)
FROM TestRuns
ORDER BY TestRunID DESC)
DECLARE #tableID INT = (SELECT tableID
FROM Tables
WHERE Name = 'Storage')
INSERT INTO TestRunTables (TestRunID, TableID, StartAt, EndAt)
VALUES (#testID, #tableID, #start, #end)
GO
I get an error after its execution:
Msg 515, Level 16, State 2, Procedure add100*sTORAGE, Line 13
Cannot insert the value NULL into column 'TestRunID', table 'OnlineShop.dbo.TestRunTables'; column does not allow nulls. INSERT fails.
When I look in the table, it has been created 99 columns.
I have some empty tables in a relation and this are the inserts of it (maybe here is the cause):
--INSERTS--
-- insert views into "Views"
INSERT INTO Views(Name) VALUES ('View1')
INSERT INTO Views(Name) VALUES ('View2')
INSERT INTO Views(Name) VALUES ('View3')
select * from views
delete from views where ViewID>1
-- insert into "Tests"
INSERT INTO Tests(Name) VALUES ('[add100*Storage-runView1-del100*Storage]')
INSERT INTO Tests(Name) VALUES ('[add100*Product-runView2-del100*Product]')
INSERT INTO Tests(Name) VALUES ('[add100*OrderProduct-runView3- del100*OrderProduct]')
SELECT * FROM Tests
--insert into tables
INSERT INTO Tables(Name) VALUES ('Table1')
INSERT INTO Tables(Name) VALUES ('Table2')
INSERT INTO Tables(Name) VALUES ('Table3')
SELECT * from Tables
-- insert into "testTable"
INSERT INTO TestTables(TestID, TableID, NoOfRows, Position) VALUES (1,1,100,1)
INSERT INTO TestTables(TestID, TableID, NoOfRows, Position) VALUES (3,2,100,1)
INSERT INTO TestTables(TestID, TableID, NoOfRows, Position) VALUES (2,3,100,1)
SELECT * FROM TestTables
-- insert into "testViews"
INSERT INTO TestViews(TestID,ViewID) VALUES (1,1)
INSERT INTO TestViews(TestID,ViewID) VALUES (3,2)
INSERT INTO TestViews(TestID,ViewID) VALUES (2,3)
SELECT * FROM TestViews
What's wrong? Thank you.

Answer 1

The error tells you everything--table TestRunTables has column "TestRunID" which requires that field to have a value. You either need to be sure to insert a value into that field, or alter the column so that it will use a default value when you don't specify it.
This line:
DECLARE #testID INT = (SELECT TOP 1 (TestRunID) FROM TestRuns ORDER BY TestRunID DESC)
will set #testID to null if no records are returned from TestRuns or if the first TestRunID is null. This is probably what you need to fix.