mssql实现字符串转换为数字（字符串转数字mssql）

In today’s world, it is often necessary to convert a character string into a number in MS SQL. In this article, we will explore how to go about this.

The first step in this process is to know what type of number you want to convert your character string into. MS SQL allows for conversion to a number of types, including integer, double, or even others such as money and binary.

Once the data type has been decided, the necessary conversion method can then be chosen. To convert a character string to an integer, the CAST or CONVERT function can be used. Here is an example of this code in action:

`SELECT CAST(‘12345’ AS INTEGER)

AS INTEGER_RESULTS`

Then to convert a character string to a double, the same CAST or CONVERT function can be used. Here is an example of this code in action:

`SELECT CAST(‘67.89’ AS FLOAT)

AS FLOAT_RESULTS`

To convert a character string to something other than a number, such as money or binary, the PARSE or CONVERT function can be used. Here is an example of this code in action:

`SELECT PARSE(‘$500.00’ AS MONEY)

AS MONEY_RESULTS`

Finally, the options for changing a character string to a number can be limited by the database engine in certain cases. If the input string contains wildcards or non-numeric symbols, the conversion may not be possible with the above methods. In this case, the string must be trimmed or filtered before conversion.

To sum up, MS SQL provides a number of options for converting character strings to numbers. Depending on the data type being converted and the input data, different methods must be used to properly convert the character string. Fortunately, MS SQL makes this process relatively simple.