SQL - execute query from table cells

This should help you go through all scripts in that table. With what you are doing, only one script will be run so if the table has 100 Scripts, only one will be executed. Hope this helps

DECLARE @Queries TABLE (ID INT IDENTITY(1,1),SQLScript VARCHAR(MAX))
DECLARE @STR_QUERY VARCHAR(MAX);
DECLARE @StartLoop INT
DECLARE @EndLoop INT


INSERT INTO @Queries
SELECT Query 
FROM [AccHelper].[dbo].[Queries]

SELECT @EndLoop = MAX(ID), @StartLoop = MIN(ID)
FROM @Queries

WHILE @StartLoop < = @EndLoop
BEGIN
    SELECT @STR_QUERY = SQLScript 
    FROM @Queries
    WHERE ID = @StartLoop

    EXEC (@STR_QUERY)

    SET @StartLoop = @StartLoop + 1
END

Try below:

DECLARE @STR_QUERY NVARCHAR(max);
SET @STR_QUERY = (SELECT Query FROM [AccHelper].[dbo].[Queries])

EXECUTE SP_EXECUTESQL @STR_QUERY