I'm using a mail job and proc to send mails to the users. It turned out that I didn't make the control for the scientific notations and they complained about it. Now, I changed the code but I can't test it. It's not all the numbers which are transformed into scientific form, so I'm looking for a way to make me know that my code is working ok.
What I need to know is, when is scientific notation used? Which numbers are transformed to scientific notation?
When you need to convert real values or float values to varchar or nvarchar sql would convert scientific notation when the digits are more than seven
When you convert real/float values to varchar/nvarchar, it will
convert as the regualr decimal number when the digits are less than 7
otherwise it will use the scientific notation.
Related
I'm importing a sas7bdat file in sas studio using proc import and one of the variables in the dataset is changing to scientific notation, e.g, 1234567891011121 is showing up as 1.2345678E15
I'm fairly new to SAS and not sure what function would help retain this particular column in its original 16 digit format instead of scientific notation. This column is of numeric data type and its length is being displayed as 8. I have been through other similar posts, but could not find a solution to work with.
SAS stores all numbers as 64bit binary floating point, so using a length of 8 bytes to store the value is the right thing. You cannot use more bytes because it only takes 8 bytes to store all 64 buts. And if you used fewer bytes you would lose precision and could not store all 16 digits.
SAS uses FORMATs to control how values are printed as text. You can use the FORMAT statement to attach a format to a variable.
It looks like you are either using the BEST12. format with that variable, or you are letting SAS use its default way of displaying numbers, which in most cases will be to use the BEST12. format.
If you want the numbers to print with 16 decimal digits then just attach the 16. format to the variable instead.
Or you could use the COMMA21. format instead and the numbers will print with thousand separators so it will be easier for humans to read them.
Example code for attaching a format to variable in a data step.
data want;
set have;
format mynumber 16.;
run;
Without using scientific notation, I need to convert a FLOAT to a string, without showing scientific notation, and capturing all possible precision.
For example, when I execute SELECT 1E0 / 1346E0 I get the following result:
This is how SQL Server displays a FLOAT value by default.
In this case, it displays 18 decimal places, which is more than the STR function can provide.
It also does not add any trailing zeros.
If SQL Server Management Studio can do this, can I also get this conversion in my code?
I need to avoid scientific notation at all costs, even if there are 20 leading zeros after the decimal point. A long string is not a problem.
Unfortunately, the CONVERT function does not provide what I need, even with style 3
try format()
SELECT
1E0 / 1346E0
, format(1E0 / 1346E0,'N18')
declare #float float = 0.000742942050520059
select cast(cast(#Float as decimal(38,35)) as varchar(200))
As was also noted, format works too, although I'm not a huge fan of it as it's a kind of heavy hitting CLR. but for one offs, it's fine.
I have a 64-bit integer field in my Postgres database, which is populated with 64 bit integer numbers. (Non) coincidentally, those numbers are actually 8-chars strings in ASCII format, little endian. For example, a number 5208208757389214273 is a numeric representation of a string "ABCDEFGH": it is 0x4847464544434241 in hex, where 0x41 is A, 0x42 is B, 0x43 is C and so forth.
I would like to convert those numbers purely for display purposes - i.e. find a way to leave them as numbers in the database, but be able to see them as strings when querying. Is there any way to do it in SQL? If not in SQL, is there anything I can do on the server side (install extensions, stored procedures, anything at all) which would allow this? This problem is trivially solvable with any script or programming language, but I do not know how to solve it with SQL.
P.S. And just one more time for some of trigger-happy duplicate-hammer-yielding bunch - this is not a question of translating number like 5208208757389214273 to string "5208208757389214273" (we have a lot of answers on how to do this, but this is not what I am looking for).
Use to_hex() to get a hexadecimal representation for the number. Then use decode() to turn it into a bytea. (Unfortunately I did not find any direct way from bigint to bytea.) Cast that to text and reverse() it, because of the endianess.
reverse(decode(to_hex(5208208757389214273), 'hex')::text)
ABCDEFGH
The bytea_output must be set to 'escape' for this to work properly -- use SET bytea_output = 'escape';.
(Tested on versions 9.4 and 9.6.)
An alternative way to achieve the same rsult without using SET is following:
select reverse(encode(decode(to_hex(5208208757389214273),'hex'),'escape'))
I need to store the following double value in SQL Server:
double x = 52.22105994970536;
What SQL Server datatype should I use to store values of this type. Perhaps decimal or float?
I am not sure if this is relevant but I need to store these values with a . not a , to separate the fractional portion of the values. Is there a setting in SQL Server that I should be aware of to ensure this happens?
I am not sure if this is relevant but I need to store these values with a . not a , to
separate the fractional portion of the values. Is there a setting in
SQL Server that I should be aware of to ensure this happens?
No, it is totally enough to learn programming to the point you realize that this is not a question at all - decimals are stored as decimals. "." or "," are part of the visual conversion (the "ToString" call, so to say) to print the value and have nothing to do with the value.
If you want to store a double, you want to store a double. Point. If you want to make sure your program presents it with a ".", then PROGRAM THE UI PROPERLY, but do not bother SQL Server internal storage with it. Normally they are shown in the locale - which is smarter than hardcoding in most cases. SO, maybvbe you force-change the UI locale? Or hardcode the conversion to apply every time you print out a value.
What SQL Server datatype should I use to store values of this type. Perhaps decimal or
float?
http://msdn.microsoft.com/en-us/library/ms187752.aspx
explains the data types of sql server.
Choose one that fits your requiremnents. Likely a float version with a given precision. Now, if you ar afraid because those are named as "approximate numeric" note that a double IS an approximate numeric, also in C# (or any other front end language you use - you do not tell us).
Default recommended mappings are at http://msdn.microsoft.com/en-us/library/ms131092.aspx and would point towards a "float".
As Damien_The_Unbeliever stated formatting is (well should be irrelevant) formatting is something you do for display, reporting etc.
As for whether to use floating point or fixed point (decimal), decimal solves a lot of issues IF the language you are using to access it has a decimal type. If you are manipulating the numbers as doubles then using decimal on the back end won't give you that much, as you will still be manually coping with the inherent inaccuracies of floating point representation.
Ex:- For example we are uploading a sheet with mobile call details. which is having one field called “dialed number “. It might be more than 10 digits some times and the same has been converting to Scientific notations in the excel sheets and the same we are uploading to the database. How to convert this scientific notation to numbers in the database.
Kindly help me by providing the possible ways to convert the Scientific notation to Number. Please let me know if any some more information needed.
Excel does not change the actual value of a cell, it just displays it in the scientific notation.
Have you actually tried to import data from excel into SQL Server?