在SQL Server中从varchar转换为numeric

Question

In my table data is stored as ((1000.000) + 200.000) + 1000.00

Data type of the column is nvarchar .

I would like get the output while selecting the table as 2200.000

Answer 1

Use dynamic sql

declare @query varchar(max) = 'select ((1000.000) + 200.000) + 1000.00'

exec(@query)

Answer 2

this this...

CREATE TABLE table3
(
    formula_id int,
    formula varchar(max)
)

INSERT INTO table3 (formula_id, formula)
VALUES
(1, '((1000.000) + 200.000) + 1000.00')

DECLARE @formula varchar(max)
SELECT @formula = formula FROM table3 WHERE formula_id = 1    
DECLARE @query varchar(max) = 'SELECT ' + @formula
EXEC(@query)

Note : The last 4 query must run at the same time, else no result will be shown.