Question number data type

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• Largest number of digits for the NUMBER data type?

  What length more of a NUMBER that Oracle will "support"?

  The documentation says the following:

  Limitations of the data type says:

  «Can be represented in a comprehensive precision 38 digits»

  NUMBER of Data Types says:

  "Oracle guarantees portability of numbers with precision of up to 20 digits of base-100, which equals 39 or 40 decimal digits according to the position of the decimal point."

  I realize account that if I define a column as simply NUMBER, I can insert numbers with a size up to 126 characters.  However, Oracle seems to maintain only the first 40 digits in MOST cases.  The largest number of digits, it seems to allow is 40 before it begins to be replaced by 0.

  With numbers that have more than 40 figures, Oracle will sometimes replace all numbers according to the 38th numbers with a 0 and sometimes replace 0 after the digit 39th or 40th.

  Therefore, what is the largest number of digits, can be trusted to safely store Oracle?

  This is the code I used for this testing process.

  create the table max_num (num number);

  declare

  number of l_x;

  Start

  for x in 1.200

  loop

  l_x: = x;

  insert into max_num values (rpad (1, x, 1));

  end loop;

  exception

  while others then

  dbms_output.put_line ('STOP: ' | l_x);

  dbms_output.put_line (SQLERRM);

  end;

  /

  Select num, length (replace (num, 0)) of max_num;

  What length more of a NUMBER that Oracle will "support"?

  You have already given your own answer. If 'length': the maximum number of digits is written the doc gives you the answer:

  999... (38 9's) x 10 value maximum¹²⁵

  The 38/39/40, hereinafter referred to as the doc means "significant digits". This is why rounding or truncation occurs if you provide more significant digits of 38/39/40.

  Oracle stores the numbers internally in a binary format 21 bytes using a documented structure in the doc of the OIC in the section 'NUMBER'.

  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e10646/oci03typ.htm#i423684

  Oracle database stores the values of the NUMBER data type in a variable length format. The first byte is the exponent and is followed by 1 to 20 mantissa bytes. The high bit of the exponent byte is the sign bit; It is defined for positive numbers, and it is cleared for negative numbers. The lower 7 bits represent the exponent, which is a number of base-100 with an offset of 65.

  This article from doc continues to show you how to convert the internal format to the real value.

  An additional byte of 1 is used for all types of data to store the length; That's why you often see docs saying numbers can take 22 bytes.

• HO to Comapre with Number data Type

  Hello
  
  My need is to perform validation in the ValidateEntity method.
  
  How to compare the data type number:
  
  For ex: number = gatAbc();
  
  If(a>10)
  {
  throw new oaExcption...
  }
  
  But while comapring got compiler error
  
  Error (218,17): not found >(oracle.jbo.domain.Number, int) method in the abc.oracle.apps.per.irc.pqr.schema.server.XxabcEOImpl class
  
  So please tell me how to compare integer value with the Number data type
  
  Thanx

  Check with the float. It will certainly work.

  float number = Float.parseFloat(HrsPerDay); //HrsPerDay is a String and I am converting it to float 
  
  if(( number <= 0) || (number >= 21))
                     {
                          throw new OAAttrValException(OAAttrValException.TYP_VIEW_OBJECT,
                                            "xxCopyResourceVO1",
                                            rowi.getKey(),
                                            "NoOfCopies",
                                            rowi.getAttribute("NoOfCopies"),
                                            "PA",
                                            "xx_xx_COPY_POSITIVE_NUM");
                     }
  

  Here in this code I also check the hours cannot be less then 0 and 20 above.

  Thank you
  -Anil

• Convert or map Typedonnees decimal Transact-SQL for Oracle Number data type?

  MSSQL 2005
  Oracle 10.2 g
  
  In a MSSQL table, I have a column with the data type set on (decimal (1.0), null) with the values of line-1. (695 lines in total)
  
  In the Oracle table, the proposed mapped column is a number data type. When I import data, I received 695 errors with the message "invalid value for the field. How to properly convert or map Decimal (MSSQL) Transact-SQL for Oracle Number data type for a negative value?
  
  Thank you.

  How do you load data into Oracle? What tool or programming language you are using? Can you post something cause what you stated in your post should work, but there may be some ODBC, or other type of conversion factors to be taken into account.

   > create table t1 (field1  number(1,0));
  
  Table created.
  
   > insert into t1 values (-1);
  
  1 row created.
  
  UT1 > select * from t1;
  
      FIELD1
  ----------
          -1
  

  HTH - Mark D Powell.

• Data problem whith model number data type

  Hi all

  Here's a strange thing with the data model of the Editor (Oracle Business Intelligence 11.1.1.7.0 / windows 7 / Firefox).

  Create a data set of sql query with this statement "select 1.23 double." The data type of the column is whole and cannot be changed.

  So I use the cast function "select cast (1.23 v number (16.2)) double ' and now it's OK the data type is double.

  Now add a second line, change the statement like this:

  Select cast (1.23 v number (16.2)) double

  Union of all the

  Select cast (4.56 v number (16.2)) double

  If you save the template, and charge it, the type of data has changed in full!

  Anyone know why this is happening?

  The patch should be applied, but is a temporary solution:

  Select cast (d.v number (12,2)) v

  de)

  Select v 1.23 double

  Union of all the

  Select 2.34 double v

  ) d

  Thank you

• Table of functions and direct requests for NUMBER data types database

  Hello. I call a number of functions table of our Enterprise BI server, and I chose to do this by using direct database requests (I believe you can also call functions table in the physical layer of the repository, but is not what I do). The problem is that whenever I go back any number of the table function which is not a whole number (1.23, for example), BI assigns the INTEGER data type to the field rather than the data type DOUBLE, rounded so my number to the nearest integer. Here is a short example:
  
  Create these 3 database objects:
  
  CREATE or REPLACE TYPE my_row AS OBJECT (my_num NUMBER);
  
  CREATE or REPLACE TYPE my_tab AS TABLE OF THE my_row;
  
  FUNCTION to CREATE or REPLACE my_table_function RETURN my_tab
  PIPELINED IS
  BEGIN
  PIPE ROW (my_row (1.23));
  END;
  /
  
  
  Make this your request at your request Direct to database:
  
  SELECT my_num FROM table (my_table_function);
  
  
  This query returns correctly '1.23' when it is called from the database. In BI, on the other hand, it returns a value of '1' (and the field of labels an INTEGER rather than data type DOUBLE). If at the request of data Direct you change column properties-> data-> decimal from 0 to 2 Format, then it displays is not surprising "1.00". I then tried to change MY_ROW. Data type of MY_NUM by explicitly specifying the precision and no luck. BI still labels this field as an INTEGER. Then I started to try to deceive BI massaging the SQL statement itself. None of the following worked:
  
  SELECT to_number (my_num) as my_num2 FROM table (my_table_function);
  SELECT my_num2 + 0.01 as my_num3 FROM (SELECT my_num - 0.01 AS my_num2 FROM table (my_table_function));
  SELECT to_number (to_char (my_num)) as my_num2 FROM table (my_table_function);
  SELECT to_number (substr (to_char ('x' | my_num), 2)) as my_num2 FROM table (my_table_function);
  
  Now, I found a solution, but I'm surprised that I have to resort to that:
  
  SELECT * FROM (SELECT / * + NO_MERGE * / table my_num (my_table_function));
  
  Is anyone out there knows a better way to do it? The above is a hack in my opinion. :)
  
  Thanks in advance for any input.
  
  -Jim

  Yes, it's really amazing.
  But I got it.

  CREATE OR REPLACE TYPE my_row AS OBJECT (my_num NUMBER(10,2));
  

  and in your SQL:

  SELECT cast(my_num as double precision) as my_num2 FROM table(my_table_function);
  

  I have the good result and I see the numbers after the decimal point.
  Very delicate!

  Published by: gerardnico on July 7, 2009 14:55 change number (10.2) in double precision... pffff

• Number data type used on a date column

  Hi Forum,

  I have a table with one column defined as number type.

  This column contains the date information and has an index defined on it.

  When I issue a select statement on this table based on this column for over 5 years of data, the query takes a long time.

  Select count (*) in x if date = 20070411

  The query takes a long time.

  such a situation is causing a problem when the where clause on a date, but the field filters is defined has a number type.

  All the columns in this table are defined as non-unique, but the date column seems to be more selective.

  Just curious to know if this type of data can have any impact IE do not provide the correct information to the optimizer etc.?

  Thanks for any help or advice

  Hello

  user3206995 wrote:

  Hi Forum,

  I have a table with one column defined as number type.

  This column contains the date information and has an index defined on it.

  When I issue a select statement on this table based on this column for over 5 years of data, the query takes a long time.

  Select count (*) in x if date = 20070411

  The query takes a long time.

  such a situation is causing a problem when the where clause on a date, but the field filters is defined has a number type.

  Yes; You can count on having a lot of different problems, if you are storing information on dates in NUMBER of columns.  The columns DATE to the date information.

  DATE is also a keyword from Oracle, so it's a very bad name of a column.  Use a column name as entry_date or date_column instead of just date.

  All the columns in this table are defined as non-unique, but the date column seems to be more selective.

  If

  date_column = 20070411

  is the only requirement, and it is slow, then it seems that you do not have an index on date_column, and you need to create a.

  For all performance issues, see the FAQ forum:

  Re: 3. how to improve the performance of my query? / My query is slow.

  Just curious to know if this type of data can have any impact IE do not provide the correct information to the optimizer etc.?

  It doesn't look like this problem is caused by using the wrong type of data.  Many others will, however.

• Rounding problem number data type

  If I have a table with a numeric column where the third decimal place is set to 2, and I want to add a value of documents with more than 2 decimal places. In this case, oracle should throw us the error message "Unable to insert in etc..". He simply insert the disc by applying an auto round and do not lift an error.i wants it allows insertion of how it is possible
  
  concerning

  SQL> insert into test (a) values (trunc(111.156,2));
  
  1 row created.
  
  SQL> select * from test;
  
           A          B
  ---------- ----------
        1.11        1.1
       11.11         11
      111.11        110
     1111.11       1100
         111
      111.15
  
  6 rows selected.
  
  SQL>
  

• the number (use of space) data type

  Hi guys,.

  Just a query.

  I have a table with a data type of existing column - number (2).

  If I change it to number (8), it will take an extra space if the inserted values are from 2-digit?

  Any URL to reference?

  Thank you

  I have a table with a data type of existing column - number (2).

  If I change it to number (8), it will take an extra space if the inserted values are from 2-digit?

  Any URL to reference?

  No - the amount of space takes a NUMERIC value is based ONLY on the actual value you store.

  You can store 20 numbers that don't take no more space than would a number to two digits.

  Do not believe? Then just store values in a column NUMBER then question the values and the values of DUMP (myColumn) out and see how the actual duration and the internal representation. The value '12300000000000' will not take any space more than the value "123" since the number of SIGNIFICANT digits is the same.

  See my response in this thread of the year last for details and sample data.

  See the programmer's Guide of the OIC for details on how MANY values are stored internally.,.

  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e10646/oci03typ.htm#sthref426

  Oracle database stores the values of the NUMBER data type in a variable length format. The first byte is the exponent and is followed by 1 to 20 mantissa bytes. The high bit of the exponent byte is the sign bit; It is defined for positive numbers, and it is cleared for negative numbers. The lower 7 bits represent the exponent, which is a number of base-100 with an offset of 65.

  To calculate the decimal exponent, add 65 to the exponent of base-100 and add another 128 if the number is positive. If the number is negative, do you the same thing, but eventually the bits are inverted. For example,-5 has an exponent of base-100 = 62 (0x3e). The decimal exponent is therefore (~ 0x3e)-128-65 = 0xc1-128-65 = 193-128-65 = 0.

  Each byte of the mantissa is a base-100 digit, in the 1,100 range. For positive numbers, the digit has 1 added to it. Thus, the number of mantissa for the value 5 is 6. For negative numbers, instead of adding 1, the digit is subtracted from 101. Thus, the digit of the mantissa of the number - 5 is 96 (101-5). Negative numbers have a byte containing 102 appended to the data bytes. However, negative numbers with 20 mantissa bytes do not have byte 102 end. Because the digits of the mantissa is stored in base 100, each byte can represent 2 decimal digits. The mantissa is normalized; zeros are not stored.

  Up to 20 data bytes can represent the mantissa. However, only 19 are guaranteed to be precise. 19 data bytes, each representing a base-100 digit, give a maximum precision of 38 digits for an Oracle NUMBER .

• Insert the ROWNUM in a column of data type of NUMBER table

  Hello

  I have a table that has a column named "rank" of the NUMBER data type. Basically, I want to make an analysis of top-n and insert the ROWNUM with other columns in the table.

  Definition of table1:

  CREATE TABLE

  (

  col1 VARCHAR2 (10),

  Col2 NUMBER,

  NUMBER of col3,

  rank NUMBER

  );

  INSERT INTO table1

  SELECT col1, col2, col3, rownum

  DE)

  SELECT col1, col2, col3

  FROM table2

  ORDER BY DESC of col3

  )

  WHERE rownum < = 5;

  I get an error ORA-01722: invalid number. I think the mistake is virtual ROWNUM is not data type of NUMBER, so I tried to cast as CAST (ROWNUM AS NUMBER), but it does not work, same error. Can can you please shed some light on how to convert a ROWNUM number or if the issue is something else.

  you're right, your example worked. It is an example of table I just created just to illustrate the problem, but my real table was always showing the same problem. Weird, isn't? However when I added the column names after that insert the question but statement I resolved. Adding code

  INSERT INTO TABLE1

  (col1, col2, col3, rank) - added

  SELECT col1, col2, col3, rownum

  DE)

  SELECT col1, col2, col3

  FROM table2

  ORDER BY DESC of col3

  )

  WHERE rownum<=>

  So that means ROWNUM returns number; and another confusion: why the inclusion of the column has solved my problem when it is not necessary for your example. in any case thank you.

• match the number with the varchar data type

  Hi all
  
  I want to compare the number data type with string. Is this possible? I use the function to_char. The example below.
  

  SQL> select * from tab_a;
   
   PLOT_NUMBER
  ------------
             1
             2
             3
             4
             5
             6
   
  6 rows selected

  SQL> select * from tab_b;
   
  PLOT_NAME       PLOT_NUMBER
  --------------- ------------
  seawods         5
  bridge cros     2,4
  hill park       1
  bash hunk       3,6

   
  SQL> select a.*, b.* from tab_a a, tab_b b where to_char(a.plot_number)=b.plot_number;
   
   PLOT_NUMBER PLOT_NAME       PLOT_NUMBER
  ------------ --------------- ------------
             1 hill park       1
             5 seawods         5

  as you can see here this number of parcel 2, 4, and plot_number 3.6 not reported because they are string.
  
  Can anyone please suggest what can do us in this case.
  
  I can't do chane data type.
  
  Thanks in advance
  SAZ

  What you can do in the case?

  Drop table table_b purge

  as the 'design' of this table is obviously out of whack, and the content should have been

  PLOT_NAME       PLOT_NUMBER
  --------------- ------------
  seawods         5
  bridge cros     2
  bridge cros     4
  hill park       1
  bash hunk       3
  bash hunk       6
  

  You now have the instr function to the "join".
  I would recommend standardization of the design. NOW

  -----------------
  Sybrand Bakker
  Senior Oracle DBA

• data type for astromical algorithms

  Hello everyone.

  IM using Oracle 12 g of data.

  I have to face a new application where I have to develop a large number of astronomical algorithms, normally calculated them on the speed of the planets, astronomical positions and so forth.

  These algorithms usually have a large number of decimal place, between 10 and 20.

  So, Im trying to find the best types of data, because the accuracy is a must. And these are my doubts...

  Read the tutorial of Oracle it say that the number data type contains all the other subclass of numbers. For example, as I understand it, the integer data type is only one type of data number with some restrictions.

  My question is:

  If I declare a variable as number, this variable will have the same accuracy as a variable declared as binary_double? For example

  Declare

  x number; -Without defining the decimal scale in this way, it can accept the range possible decimal

  x BINARY_DOUBLE:-that class will have the same accuracy as the number of x?

  What is the best way to declare these vars?  by order of accuracy, storage and speed is not so important in this application.

  Regards to all the world and thanks in advance.

  Use the NUMBER unless you have a specific reason NOT to use it.

  See the built-in data types in the doc of the SQL language

  http://docs.Oracle.com/CD/B28359_01/server.111/b28286/sql_elements001.htm#i54330

  2

  NUMBER[ (p [, s]) ]

  Number having precision p and scale s . Precision p may vary from 1 to 38. Wide s can vary from-84 to 127. Precision and scale are in decimal digits. A NUMBER value requires 1 to 22 bytes.

• Size of the numeric data type

  Hello
  
  Please can anyone suggest what will be the size allocated for a NUMBER data type in a table.
  
  When we question user_tab_columns all the table illustrates data_length 22 with the NUMBER data type.
  
  So what is the importance of accuracy on the size it takes to store data on the storage device?
  
  Please suggest...

  I think it depends on the values that you actually store and you can find with VSIZE.

  Please take a look at this article:

  http://asktom.Oracle.com/pls/asktom/f?p=100:11:0:P11_QUESTION_ID:1856720300346322149

  Published by: hm on 29.09.2011 05:33

• ODI-15005: data type "varchar" does not close in technology: file?

  Hello

  I created the interface that loads data from flat file (source) oracle (target).

  For this, I took LKM SQL FOR SQL and SQL TO ADD FILE IKM.

  Please check the source and target data types.

  

  When I am executing this interface, I get the error as

  ODI-15005: data type "varchar" does not close in technology: file.

  
  

  To resolve this error, I changed the types of flat file data.

  I went to the Manager of topology-> select technology of files-> data types: string - > orcle to the number data type.

  Even if I do not correct this error. Please help me.

  
  

  Thanks in advance,

  A.Kavya.
  

  Hello

  Can you please check what are the data types for the columns in your data target store. As you say it's a file, can you check if the data type for the two columns has the String value (and not varchar).

  Thank you

  Ajay

• How to convert clob data type varchar2.

  Hello
  If select below questioning the data type must be varchar2 but I want to convert the text to a clob.
  
  
  Select 'World' of double;
  
  
  Kind regards
  Fame

  SQL> Select 'My_name is rajuvan' Vrchr,
  2       TO_CLOB('My_name is rajuvan') clb
  3      from dual; 
  
  VRCHR                          CLB
  ------------------------------ ------------------------------
  My_name is rajuvan             My_name is rajuvan
  
  SQL>