convert float into varchar in SQL server without scientific notation

Question

convert float into varchar in SQL server without scientific notation and trimming decimals.

for Ex:

i have float value 1000.2324422, then it

Answer 1

Below is an example where we can convert float value without any scientific notation.

DECLARE @Floater AS FLOAT = 100000003.141592653

SELECT CAST(ROUND(@Floater, 0) AS VARCHAR(30))
      ,CONVERT(VARCHAR(100), ROUND(@Floater, 0))
      ,STR(@Floater)
      ,LEFT(FORMAT(@Floater, ''), CHARINDEX('.', FORMAT(@Floater, '')) - 1)

SET @Floater = @Floater * 10

SELECT CAST(ROUND(@Floater, 0) AS VARCHAR(30))
      ,CONVERT(VARCHAR(100), ROUND(@Floater, 0))
      ,STR(@Floater)
      ,LEFT(FORMAT(@Floater, ''), CHARINDEX('.', FORMAT(@Floater, '')) - 1)

SET @Floater = @Floater * 100

SELECT CAST(ROUND(@Floater, 0) AS VARCHAR(30))
      ,CONVERT(VARCHAR(100), ROUND(@Floater, 0))
      ,STR(@Floater)
      ,LEFT(FORMAT(@Floater, ''), CHARINDEX('.', FORMAT(@Floater, '')) - 1)

SELECT LEFT(FORMAT(@Floater, ''), CHARINDEX('.', FORMAT(@Floater, '')) - 1)
      ,FORMAT(@Floater, '')

In the above example, we can see that the format function is useful for us. FORMAT() function returns always nvarchar.