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Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. Yeah - When adding a new field via both the Attribute Table and ArcToolbox - the scale and precision values are respected. The precision and scale of a field describe the maximum size and precision of data that can be stored in the field. When you create a float, double, or integer field and specify 0 for precision and scale, the tool will attempt to create a binary type field if the underlying database supports it.
When you create float and double fields and specify a precision and scale, if your precision is greater than 6, use a double; otherwise, use a float.
If you specify a scale of 0 and a precision of 10 or less, you should be creating integer fields.
Shapefiles, which use dBASE tables as the underlying storage format for the attribute table, DO appear to support precision and scale. Looks like shapefiles (which use dBASE tables as the underlying attribute table) DO support precision and scale although this is not spelled out in the documentation. To check you could always open up model bulider, set up a similar gp workflow and export as a python script. Not the answer you're looking for?Browse other questions tagged arcmap arcpy shapefile or ask your own question. Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community.
When this result is multiplied by 100 (the value 100 is converted to DECIMAL(3,0)), the result has precision is 23 and scale 10. Could anyone tell what the formula is for calculating precision and scale when decimals are multiplied?


I suggest reviewing the source documentation used in the posted linked in the Question as it describes the formulas to use for 6 different operations involving decimals: Precision, Scale, and Length.
And to make it even clearer, I added a 4th column to the test query to reduce the initial division computation to the resulting DECIMAL(19, 10) so there is no question of the order of the 3 mathematical operations happening in C2 and C3.
Not the answer you're looking for?Browse other questions tagged sql-server sql-server-2012 t-sql sql-server-2014 decimal or ask your own question. The parameter supplied to the float data type defines the number of bits that are used to store the mantissa of the floating point number. Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. I've noticed that whenever I generate a database schema from an EF model that includes decimal fields the SQL type used is decimal(18,0) - this causes all decimal values to be effectively truncated to integers on persistence to the database. Is there a configuration option or setting that can be applied to control the default precision of all SQL decimal types that are generated? This does allow you to set the scale and precision for each individual field, but is there a way to set a more useful default for all decimals? If you want to change default value you can modify T4 template responsible for generating SQL.
As is the case with many of my topics of late, I came across this one by helping somebody else.
The particular case I was working on was focused on the decimal datatype, and so we will work with that throughout this post explicitly.
Scale – specifies the number of digits to the right of the decimal point that an object can hold.
This will provide us with ample example of the math involved when calculating the resultant precision and scale of a SQL math operation.


Precision and scale only apply to RDBMSes that support them, such as Oracle and SQL Server.
The precision describes the number of digits that can be stored in the field and the scale describes the number of decimal places for float and double fields. Personal and file geodatabases support only binary type fields, and precision and scale are ignored. If you create a double field and specify a precision of 6 or less, a float field is created. When creating integer fields, your precision should be 10 or less, or your field may be created as double.
I was able to add a field of type Float with Precision 6 and scale 4 and it shows up correctly in the UI.
As such, internally they contain information about the total number of characters the field can hold.
If you create a float field and specify a precision greater than 6, a double field is created.
What I don't know is why the values that I pass in via scripting (AddField) are not respected.




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