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Question: How To How To Convert Numeric Expression Data Types using the CONVERT() Function??

Answer: If you want to convert the data type of a numeric expression to a new data type, you can use the CONVERT(data_type, expression) function. The tutorial exercise below shows you how to use the CONVERT() function:

-- FLOAT converted to NUMERIC by CONVERT()
DECLARE @pi FLOAT(24);
SET @pi = 3.141592E+00;
SELECT CONVERT(NUMERIC(5,2), @pi);
GO
3.14

-- FLOAT converted to NUMERIC by CONVERT()
DECLARE @x FLOAT(24);
SET @x = 12345.12E+00;
SELECT CONVERT(NUMERIC(10,5), @x);
GO
12345.12012

-- FLOAT converted to INT by CONVERT()
DECLARE @x FLOAT(24);
SET @x = 12345.12E+00;
SELECT CONVERT(INT, @x);
GO
12345

If you want to convert the data type of a numeric expression to a new data type, you can use the CONVERT(data_type, expression) function. The tutorial exercise below shows you how to use the CONVERT() function:

-- FLOAT converted to NUMERIC by CONVERT()
DECLARE @pi FLOAT(24);
SET @pi = 3.141592E+00;
SELECT CONVERT(NUMERIC(5,2), @pi);
GO
3.14

-- FLOAT converted to NUMERIC by CONVERT()
DECLARE @x FLOAT(24);
SET @x = 12345.12E+00;
SELECT CONVERT(NUMERIC(10,5), @x);
GO
12345.12012

-- FLOAT converted to INT by CONVERT()
DECLARE @x FLOAT(24);
SET @x = 12345.12E+00;
SELECT CONVERT(INT, @x);
GO
12345 Source: CoolInterview.com

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