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==LTRIM("ABCBCA12345", "ABC")==



<source lang="sql">

SQL>
SQL> SELECT LTRIM("ABCBCA12345", "ABC")
2 FROM DUAL;
LTRIM
-----
12345

Page 1

</source>

==LTRIM and RTRIM==



<source lang="sql">

SQL>
SQL> CREATE TABLE old_item (
2 item_id CHAR(20),
3 item_desc CHAR(25)
4 );
Table created.
SQL>
SQL> INSERT INTO old_item VALUES("LA-101", "Can, Small");
1 row created.
SQL> INSERT INTO old_item VALUES("LA-102", "Can, Large");
1 row created.
SQL> INSERT INTO old_item VALUES("LA-103", "Bottle, Small");
1 row created.
SQL> INSERT INTO old_item VALUES("LA-104", "Bottle, Large");
1 row created.
SQL> INSERT INTO old_item VALUES("NY-101", "Box, Small");
1 row created.
SQL> INSERT INTO old_item VALUES("NY-102", "Box, Large");
1 row created.
SQL> INSERT INTO old_item VALUES("NY-103", "Shipping Carton, Small");
1 row created.
SQL> INSERT INTO old_item VALUES("NY-104", "Shipping Carton, Large");
1 row created.
SQL>
SQL> SELECT "Item " ||
2 item_id ||
3 " is described as a " ||
4 item_desc ||
5 "." "Item Description Sentence"
6 FROM old_item;
Item Description Sentence
-----------------------------------------------------------------------
Item LA-101 is described as a Can, Small .
Item LA-102 is described as a Can, Large .
Item LA-103 is described as a Bottle, Small .
Item LA-104 is described as a Bottle, Large .
Item NY-101 is described as a Box, Small .
Item NY-102 is described as a Box, Large .
Item NY-103 is described as a Shipping Carton, Small .
Item NY-104 is described as a Shipping Carton, Large .
8 rows selected.
SQL>
SQL>
SQL>
SQL> drop table OLD_ITEM;
Table dropped.
SQL>
SQL>

</source>

==LTRIM function removes leading characters==



<source lang="sql">

SQL>
SQL> --LTRIM function removes leading characters
SQL>
SQL> SELECT LTRIM("ST" , "STEVENS") AS TRIM FROM Dual;
T
-

SQL>

</source>

==LTRIM("OPS$SPORANO", "OPS$")==



<source lang="sql">

SQL>
SQL> SELECT LTRIM("OPS$SPORANO", "OPS$")
2 FROM DUAL;
LTRI
----
RANO

Page 1

</source>

==Ltrim: removes a set of characters from the left of a string==



<source lang="sql">

SQL>
SQL> -- Ltrim: removes a set of characters from the left of a string.
SQL>
SQL>
SQL> -- LTRIM stands for "left trim."
SQL> -- The general format for this function is:
SQL>
SQL> -- LTRIM(string, characters_to_remove)
SQL>
SQL> SELECT LTRIM("...Mitho", ".") FROM dual;
LTRIM
-----
Mitho
SQL>

</source>

==select """ || ltrim(ome String" ) || """ "A String"==



<source lang="sql">

SQL>
SQL> select """ || ltrim( " Some String" ) || """ "A String" from dual;
A String
-------------
"Some String"
1 row selected.
SQL>
SQL> --

</source>

==Trim letter S from both sides==



<source lang="sql">

SQL>
SQL> create table emp
2 ( empno NUMBER(4) constraint E_PK primary key
3 , ename VARCHAR2(8)
4 , init VARCHAR2(5)
5 , job VARCHAR2(8)
6 , mgr NUMBER(4)
7 , bdate DATE
8 , sal NUMBER(6,2)
9 , comm NUMBER(6,2)
10 , deptno NUMBER(2) default 10
11 ) ;
Table created.
SQL> insert into emp values(1,"Tom","N", "Coder", 13,date "1965-12-17", 800 , NULL, 20);
1 row created.
SQL> insert into emp values(2,"Jack","JAM", "Tester",6,date "1961-02-20", 1600, 300, 30);
1 row created.
SQL> insert into emp values(3,"Wil","TF" , "Tester",6,date "1962-02-22", 1250, 500, 30);
1 row created.
SQL> insert into emp values(4,"Jane","JM", "Designer", 9,date "1967-04-02", 2975, NULL, 20);
1 row created.
SQL> insert into emp values(5,"Mary","P", "Tester",6,date "1956-09-28", 1250, 1400, 30);
1 row created.
SQL> insert into emp values(6,"Black","R", "Designer", 9,date "1963-11-01", 2850, NULL, 30);
1 row created.
SQL> insert into emp values(7,"Chris","AB", "Designer", 9,date "1965-06-09", 2450, NULL, 10);
1 row created.
SQL> insert into emp values(8,"Smart","SCJ", "Coder", 4,date "1959-11-26", 3000, NULL, 20);
1 row created.
SQL> insert into emp values(9,"Peter","CC", "Designer",NULL,date "1952-11-17", 5000, NULL, 10);
1 row created.
SQL> insert into emp values(10,"Take","JJ", "Tester",6,date "1968-09-28", 1500, 0, 30);
1 row created.
SQL> insert into emp values(11,"Ana","AA", "Coder", 8,date "1966-12-30", 1100, NULL, 20);
1 row created.
SQL> insert into emp values(12,"Jane","R", "Manager", 6,date "1969-12-03", 800 , NULL, 30);
1 row created.
SQL> insert into emp values(13,"Fake","MG", "Coder", 4,date "1959-02-13", 3000, NULL, 20);
1 row created.
SQL> insert into emp values(14,"Mike","TJA","Manager", 7,date "1962-01-23", 1300, NULL, 10);
1 row created.
SQL>
SQL>
SQL> select ename
2 , ltrim(ename,"S") as ltrim_s
3 , rtrim(ename,"S") as rtrim_s
4 from emp
5 where deptno = 20;
ENAME LTRIM_S RTRIM_S
-------- -------- --------
Tom Tom Tom
Jane Jane Jane
Smart mart Smart
Ana Ana Ana
Fake Fake Fake
SQL>
SQL>
SQL> drop table emp;
Table dropped.

</source>

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в 13:45, 26 мая 2010

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