The following illustrates the syntax of the NUMBER data type: In the definition of an integer column, it is an alias for NOT NULL AUTO_INCREMENT UNIQUE. Find out how to change a column's default value … But What I found to be strange that, it is accepting digits beyong 38 digits.ie. I can see why this approach makes sense, but I was wondering if there was a way to override this behaviour, and make it so that if a NULL value is passed, that it causes Oracle to assign the explicit DEFAULT value that is specified in the function header? NUMBER variables can hold values as small as 10-130 (1.0E - 130) and as large as 10126 - … Oracle interprets NULL as a value, and so does not initialise varNumber to its default of 0. I have set the default value using PL/SQL Oracle Database will allocate space for a maximum of 40 digits, and the decimal point will float to best accommodate whatever values you assign to the variable. insert into emp values (101,’Sami’,2000,’Bom’); Then the city column will have value ‘Bom ‘. A DEFAULT value clause in a data type specification explicitly indicates a default value for a column. The following example shows a procedure declaration that contains default values: PROCEDURE process_emp_paycheck(EMP_ID IN NUMBER, PAY_CODE IN NUMBER, SICK_USED IN NUMBER, VACATION_USED IN NUMBER, FEDERAL_TAX IN NUMBER DEFAULT .08, STATE_TAX IN NUMBER DEFAULT .035); And here is an example execution: Inserting a value for just one of the columns - what will happen to the second column for that row? Re: default value for maximum number of processes Karan Kukreja Nov 16, 2010 8:45 AM ( in response to Rajesh Lathwal ) Thank you Rajesh.. Let’s add a new column named status to the accounts table with default value 1. Such a declaration results in a floating-point number. create table emp (empno number(5), name varchar2(20), sal number(10,2), city varchar2(20) default ‘Hyd’); Now, when user inserts record like this. Using default values on database columns helps to insulate database design issues from application code. The DEFAULT constraint is used to provide a default value for a column. To define default value for columns create the table as given below. Summary: in this tutorial, you will learn about the Oracle NUMBER data type and how to use it to define numeric columns for a table.. Introduction to Oracle NUMBER data type. Number Datatype Hi Tom,I declared the datatype of a column of a table as NUMBER & Presumed it to be Number(38) to be specific. I am trying to populate the PK field from a sequence number in my page used to insert/update/delete records. The Oracle NUMBER data type is used to store numeric values that can be negative or positive. ALTER TABLE accounts ADD status NUMBER ( 1 , 0 ) DEFAULT 1 NOT NULL ; Once you executed the statement, the values in the status column are set to 1 for all existing rows in the accounts table. Examples: CREATE TABLE t1 ( i INT DEFAULT -1, c VARCHAR(10) DEFAULT '', price DOUBLE(16,2) DEFAULT '0.00' ); SERIAL DEFAULT VALUE is a special case. 1.111E+125. If the Datatype's precision is 38 and scale can range from -84 to 127 how this value can