在存储过程中将 varchar 转换为数字时出错

Question

I am trying to insert record into a SQL Server table from a XML file. The XML file has some entries for Depth column with values that are little different for ex. -8.67991800817151E-0

Can someone please guide me how to convert that value into decimal and insert into table? Thanks.

Here is my stored procedure:

CREATE PROCEDURE [dbo].[IProjectData]   
    @xml XML
AS
BEGIN
    SET NOCOUNT ON;

    INSERT INTO DHDStrainSet 
        SELECT
            DHDStrainSet.value('(StrainID/text())[1]','VARCHAR(255)') AS StrainID,
            DHDStrainSet.value('(Depth/text())[1]','decimal(18,3)')  AS Depth,
            DHDStrainSet.value('(Strain/text())[1]','decimal(18,10)') AS Strain,
            DHDStrainSet.value('(ProjectID/text())[1]','VARCHAR(50)') AS ProjectID
        FROM
            @xml.nodes('/RSM3DDB/DHDStrainSet') AS TEMPTABLE(DHDStrainSet)
END

Sample XML file is:

<?xml version="1.0" standalone="yes"?>
<RSM3DDB>
  <DHDStrainSet>
    <StrainID>SB 1_1ef50386</StrainID>
    <Depth>-5.001987E-9</Depth>
    <Strain>0.99</Strain>
    <ProjectID>Hoop</ProjectID>
  </DHDStrainSet>
</RSM3DDB>

Answer 1

The XML file has some entries for Depth column with values that are little different for ex. -8.67991800817151E-0. Can someone please guide me how to convert that value into decimal?

Looking at the value -8.67991800817151E-0 can't be converted to a decimal , you would need to look at converting it to a float .

So this line:

 DHDStrainSet.value('(Depth/text())[1]','decimal(18,3)')  AS Depth,

Need's to be changed to (will fix the error):

 DHDStrainSet.value('(Depth/text())[1]','float') AS Depth,

So in all you said you wanted a decimal(10,3) , you could convert that value to a decimal(10,3) for example:

 convert(decimal(10,3), DHDStrainSet.value('(Depth/text())[1]','float'))  AS Depth,

This will output: -8.68