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Solved
SQL Query multiplication
Posted on 2012-12-26
In SQL, I am updating a Table : PlacedOrderDetails by mutiplying two columns and entering the mutiplied values to the Qty Column.
[Ship Qty] which is nvarchar(255)
Mutiply with
[Size] which is nvarchar(255)
Resulted value goes to [Qty] which is float.
This is the Table value
Ship Qty Size Qty
2 100 EA 200
1 14.7 GM 14
Issue with my query is, decimal value of size column treated as round number and decimal part is ignored.
How to fix to treat whole number and decimal numbers equally?
[Ship Qty] which is nvarchar(255)
Mutiply with
[Size] which is nvarchar(255)
Resulted value goes to [Qty] which is float.
update PlacedOrderDetails
set Qty = [Ship Qty] * (cast(substring(Size, 1, patindex('%[^0-9]%', Size + '/') - 1) as float) * case when charindex('X', Size, 1) > 0 then
cast(substring(substring(Size, charindex('X', Size) + 1, len(Size)), 1, patindex('%[^0-9]%', substring(Size, charindex('X', Size) + 1, len(Size)) + '/') - 1) as float)
else 1 end )
WHERE Qty IS NULL
This is the Table value
Ship Qty Size Qty
2 100 EA 200
1 14.7 GM 14
Issue with my query is, decimal value of size column treated as round number and decimal part is ignored.
How to fix to treat whole number and decimal numbers equally?
[X]
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12 Comments
Active today
For reasons you are experiencing now, it is a poor idea to include the numeric size (100) and unit of measure (EA) in the same field. Especially when you consider that a user can easily make a typo such that T-SQL can't uniformly split the numeric 14.7's from the char GM's.
Recommend you split these into two separate columns in your table.
Then the math would be easy.
Recommend you split these into two separate columns in your table.
Then the math would be easy.
Active 7 days ago
don't use varchar as data type for numerical data.
instead, use "int" or "decimal"
instead, use "int" or "decimal"
Both @Jimhorn and @angelIII - I will not be able to modify existing Table which has thousands of records.
@Jimhorn, I can create a new table like temp_PlacedOrderdetails and create two different columns as Size and SizeUnit. But again, I need to take a lengthy permission as because database belongs to a Thirdparty software provider.
Anyways for me to fix it without changing the datatype or table schema
@Jimhorn, I can create a new table like temp_PlacedOrderdetails and create two different columns as Size and SizeUnit. But again, I need to take a lengthy permission as because database belongs to a Thirdparty software provider.
Anyways for me to fix it without changing the datatype or table schema
Active 7 days ago
> I will not be able to modify existing Table which has thousands of records.
even if the table is containing records, you can modify the data types ...
you may add a new column with the proper data type, update that column from the existing one, drop the old column, and rename the new column
though you can work out your queries without changing data types, you will just end up with many more problems ...
"size" column should be 2 columns, one containing the "unit" type, the other the actual size value. ...
even if the table is containing records, you can modify the data types ...
you may add a new column with the proper data type, update that column from the existing one, drop the old column, and rename the new column
though you can work out your queries without changing data types, you will just end up with many more problems ...
"size" column should be 2 columns, one containing the "unit" type, the other the actual size value. ...
Table : PlacedOrderDetails , is loaded from a CSV file which has values SizeUnit (ie. 100 mg or 15 ml ) populated.
If i go with your decision, i have to create a new table such as temp_PlacedOrderDetails which export data from PlacedOrderDetails and split the value of Size Column to two different columns such as Size and Unit
If i go with your decision, i have to create a new table such as temp_PlacedOrderDetails which export data from PlacedOrderDetails and split the value of Size Column to two different columns such as Size and Unit
@ hpdvs2
Where should i implement your regex expression.
Because, i haven't seen $ sign on my query ???
Where should i implement your regex expression.
Because, i haven't seen $ sign on my query ???
regex format is not working , it throws error saying Substring conversion error !!
I am sure, we can achieve this through Patindex and Charindex. But having problem on formating the decimal.
Something like i am expecting
Case when ( if size column is decimal ) do this
else do this
I am sure, we can achieve this through Patindex and Charindex. But having problem on formating the decimal.
Something like i am expecting
Case when ( if size column is decimal ) do this
else do this
I believe it supposed to be this, but I don't use regex a lot. The key is that you get the decimal place as well.
One of those two should work. Otherwise just search for
patindex('^(([0-9]*)|(([0-9]*).([0-9]*)))$'
patindex('/^\d+\.?\d*$/'
One of those two should work. Otherwise just search for
regex get numeric with decimal
Thank you, I am searching online for the Patindex format. But as per your suggestion, i am getting errors ..
Error :
Invalid length parameter passed to the LEFT or SUBSTRING function.
The statement has been terminated.
update PlacedOrderDetails
set Qty = [Ship Qty] * (cast(substring(Size, 1, patindex('^(([0-9]*)|(([0-9]*).([0-9]*)))$', Size + '/') - 1) as float) * case when charindex('X', Size, 1) > 0 then
cast(substring(substring(Size, charindex('X', Size) + 1, len(Size)), 1, patindex('^(([0-9]*)|(([0-9]*).([0-9]*)))$', substring(Size, charindex('X', Size) + 1, len(Size)) + '/') - 1) as float)
else 1 end )
WHERE Qty IS NULL
Error :
Invalid length parameter passed to the LEFT or SUBSTRING function.
The statement has been terminated.
I changed the regex from '%[^0-9]%' to '%[A-Z]%'
Issue is fixed. An expert @Jared_s solved the issue in this posting :
http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_27978053.html
Issue is fixed. An expert @Jared_s solved the issue in this posting :
http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_27978053.html
update PlacedOrderDetails
set Qty = [Ship Qty] * (cast(substring(Size, 1, patindex('%[A-Z]%', Size + '/') - 1) as float) * case when charindex('X', Size, 1) > 0 then
cast(substring(substring(Size, charindex('X', Size) + 1, len(Size)), 1, patindex('%[A-Z]%', substring(Size, charindex('X', Size) + 1, len(Size)) + '/') - 1) as float)
else 1 end )
WHERE Qty IS NULL
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