How to convert string varchar in SQL Server in float format

SELECT CONVERT (varchar), CAST (@testFloat as Decimal (38,2))
SELECT STR (@testFloat, 38, 2)

Importing from Excel to sql2000, there is a list of "contacts" that have become float types, and I want to convert to nvarchar type, using the following statement

Select convert (nvarchar), convert (int, contact) from employee
Go

Data overflow, no!

Select convert (nvarchar), CONVERT (Decimal (11,0), contact) from employee
Go

Data Conversion Successful!

SELECT CONVERT (nvarchar), CAST (Contact as decimal (11,0)) from employee

Go

Data Conversion Successful!

SELECT STR (Contact form, 0) from employee
Go

Data Conversion Successful!

Summary, float---decimal----nvarchar

Convert

Cast

Str

about float conversion to varchar in SQL Server
A Float Type field, to convert to varchar, but after the decimal point is automatically deleted ... After the search can be obtained through the following conversion:

SELECT Cast (CAST (field as DECIMAL (20,7)) as VARCHAR from the table to be looked at
Or

SELECT CONVERT (VARCHAR), convert (DECIMAL (20,7), field) from the table to be searched

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