I have an object with an number of type `float`

, and I was curious why the following SQL statement does not work, but the one below it does.

```
SELECT TOP (1000) [number]
FROM [object]
WHERE CONVERT(varchar(255), number) LIKE '%201608147%'
```

Results in "0 rows found".

```
SELECT TOP (1000) [number]
FROM [object]
WHERE CONVERT(varchar(255), CONVERT(decimal(20, 2), number)) LIKE '%201608147%'
```

Results in 1 row found

**Edit:** I was asked to execute the following:

```
SELECT
number,
CONVERT(varchar(255), number),
CONVERT(varchar(255), CONVERT(decimal(20, 2), number))
FROM [object]
```

This yielded the following result:

```
number : 201608147
number cast to string: 201608147
number cast to decimal: 201608147.00
```

To show it is really a float:

### >Solution :

After simulation I found the following:

```
select nbr, Convert(varchar(255), nbr), Convert(varchar(255), Convert(decimal(20,2), nbr)) from tbl_XYZ
201608147 2.01608e+008 201608147.00
```

The Convert(varchar(255), nbr) returns the scientific notation of the number at hand as a string value; consequently the value does not match your pattern :

```
LIKE '%201608147%'
```

The reason behind this behavior is that the `Float`

DataType is used to hold an estimate of a number and not a precise value.

Floating point numbers are often shown in scientific notation. These types are used when range is more important than absolute precision.

The numbers quickly become unwieldy in other formats. Scientific notation also helps to emphasise the limited precision.

You can see the different ways that different functions can be used to format floating-point numbers in this example.

```
DECLARE @float float = 201608147;
SELECT TheNumber = @float;
SELECT ConvertWithoutStyle = CONVERT(varchar(255),@float),
ConvertWithStyle0 = CONVERT(varchar(255),@float,0),
ConvertWithStyle1 = CONVERT(varchar(255),@float,1),
ConvertWithStyle2 = CONVERT(varchar(255),@float,2),
ConvertWithStyle3 = CONVERT(varchar(255),@float,3);
```

For a float, style can have one of the values shown below. Other values are processed as 0.

```
Value Output
0 (default) A maximum of 6 digits. Use in scientific notation, when appropriate.
1 Always 8 digits. Always use in scientific notation.
2 Always 16 digits. Always use in scientific notation.
3 Always 17 digits. Use for lossless conversion. With this style, every distinct float or real value is guaranteed to convert to a distinct character string.
```

You are using an implicit conversion from float to varchar(255), which implicitly uses style 0. Your floats has more than six digits, so they it is represented in scientific notation.

**You might like to use STR or FORMAT instead.**