substr birthday : SUBSTR « Character String Functions « Oracle PL/SQL Tutorial

SQL>
SQL>
SQL> create table employees(
  2    empno      NUMBER(4)
  3  , ename      VARCHAR2(8)
  4  , init       VARCHAR2(5)
  5  , job        VARCHAR2(8)
  6  , mgr        NUMBER(4)
  7  , bdate      DATE
  8  , msal       NUMBER(6,2)
  9  , comm       NUMBER(6,2)
 10  , deptno     NUMBER(2) ) ;

Table created.

SQL>
SQL>
SQL> insert into employees values(1,'Jason',  'N',  'TRAINER', 2,   date '1965-12-18',  800 , NULL,  10);

1 row created.

SQL> insert into employees values(2,'Jerry',  'J',  'SALESREP',3,   date '1966-11-19',  1600, 300,   10);

1 row created.

SQL> insert into employees values(3,'Jord',   'T' , 'SALESREP',4,   date '1967-10-21',  1700, 500,   20);

1 row created.

SQL> insert into employees values(4,'Mary',   'J',  'MANAGER', 5,   date '1968-09-22',  1800, NULL,  20);

1 row created.

SQL> insert into employees values(5,'Joe',    'P',  'SALESREP',6,   date '1969-08-23',  1900, 1400,  30);

1 row created.

SQL> insert into employees values(6,'Black',  'R',  'MANAGER', 7,   date '1970-07-24',  2000, NULL,  30);

1 row created.

SQL> insert into employees values(7,'Red',    'A',  'MANAGER', 8,   date '1971-06-25',  2100, NULL,  40);

1 row created.

SQL> insert into employees values(8,'White',  'S',  'TRAINER', 9,   date '1972-05-26',  2200, NULL,  40);

1 row created.

SQL> insert into employees values(9,'Yellow', 'C',  'DIRECTOR',10,  date '1973-04-27',  2300, NULL,  20);

1 row created.

SQL> insert into employees values(10,'Pink',  'J',  'SALESREP',null,date '1974-03-28',  2400, 0,     30);

1 row created.

SQL>
SQL>
SQL> select ename, substr(bdate,8)+16
  2  from   employees;

ENAME    SUBSTR(BDATE,8)+16
-------- ------------------
Jason                    81
Jerry                    82
Jord                     83
Mary                     84
Joe                      85
Black                    86
Red                      87
White                    88
Yellow                   89
Pink                     90

10 rows selected.

SQL>
SQL> drop table employees;

Table dropped.

11.18.SUBSTR
	11.18.1.	The SUBSTR Function
	11.18.2.	substr(,) and substr(,,)
	11.18.3.	SUBSTR(x, start [, length]) returns a substring of x that begins at the position specified by start.
	11.18.4.	Substr retrieves a portion of the string
	11.18.5.	Retrieval begins at position 5 and again goes for 12 characters
	11.18.6.	A retrieval with no third argument: it starts at begin and retrieves the rest of the string
	11.18.7.	If begin is negative, then retrieval occurs from the right-hand side of original string
	11.18.8.	SUBSTR and INSTR used together
	11.18.9.	Combine SUBSTR and INSTR to deal with a table column
	11.18.10.	Combine DECODE and SUBSTR together
	11.18.11.	Example SELECT output using SUBSTR().
	11.18.12.	substr birthday
	11.18.13.	Compare substring in where statement
	11.18.14.	Manipulating Strings: SUBSTR and concatenation
	11.18.15.	substr(date value,8)+16