TRUNC(Number,-1) : TRUNC « Numeric Math Functions « Oracle PL / SQL

1. Oracle PL / SQL
2. Numeric Math Functions
3. TRUNC

TRUNC(Number,-1)

SQL>
SQL>
SQL>
SQL> -- create demo table
SQL> create table TestTable(
  2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
  3    MyName             VARCHAR2(10 BYTE),
  4    MyDate             DATE,
  5    MyNumber           Number(8,2)
  6  )
  7  /

Table created.

SQL>
SQL>
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19960711','YYYYMMDD'),12.12);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19970622','YYYYMMDD'),-12.12);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19980513','YYYYMMDD'),22.1);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19990624','YYYYMMDD'),-2.12);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('20000415','YYYYMMDD'),2.1);

1 row created.

SQL>
SQL> select * from TestTable;

ID   MYNAME     MYDATE      MYNUMBER
---- ---------- --------- ----------
1    Alison     11-JUL-96      12.12
1    Alison     22-JUN-97     -12.12
1    Alison     13-MAY-98       22.1
1    Alison     24-JUN-99      -2.12
1    Alison     15-APR-00        2.1

SQL>
SQL> SELECT ID, ROUND(MyNumber,-1), TRUNC(MyNumber,-1) FROM TestTable;

ID   ROUND(MYNUMBER,-1) TRUNC(MYNUMBER,-1)
---- ------------------ ------------------
1                    10                 10
1                   -10                -10
1                    20                 20
1                     0                  0
1                     0                  0

SQL>
SQL> drop table TestTable;

Table dropped.

SQL>
SQL>
           
       

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