Oracle PL/SQL/Numeric Math Functions/FLOOR

FLOOR: Returns the floor value (next lowest integer below number)

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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("2","Jason",to_date("19970622","YYYYMMDD"),-12.12); 1 row created. SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values("3","Smith",to_date("19980513","YYYYMMDD"),22.1); 1 row created. SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values("4","Tailor",to_date("19990624","YYYYMMDD"),-2.12); 1 row created. SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values("5","Darlene",to_date("20000415","YYYYMMDD"),2.1); 1 row created. SQL> SQL> SQL> select * from TestTable; ID MYNAME MYDATE MYNUMBER

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1 Alison 11-JUL-96 12.12 2 Jason 22-JUN-97 -12.12 3 Smith 13-MAY-98 22.1 4 Tailor 24-JUN-99 -2.12 5 Darlene 15-APR-00 2.1 SQL> SQL> SQL> SQL> -- FLOOR: Returns the floor value (next lowest integer below number). SQL> SQL> select MyNumber, FLOOR(MyNumber) from TestTable;

 MYNUMBER FLOOR(MYNUMBER)

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    12.12              12
   -12.12             -13
     22.1              22
    -2.12              -3
      2.1               2

SQL> SQL> SQL> SQL> drop table TestTable; Table dropped. SQL> SQL>

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FLOOR(x): Returns the largest integer less than or equal to x

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SQL> --FLOOR(x): Returns the largest integer less than or equal to x. SQL> SQL> select FLOOR(-5.2) from dual; FLOOR(-5.2)

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        -6

SQL>

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round(345.678), ceil(345.678), floor(345.678)

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SQL> SQL> select round(345.678), ceil(345.678), floor(345.678)

 2  from   dual;

ROUND(345.678) CEIL(345.678) FLOOR(345.678)

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          346           346            345
  
   
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Use floor(), mod() and date calculation to show how many weeks and days an employee has been working here

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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> select ename

 2  ,      floor(   (sysdate-bdate)/7) as weeks
 3  ,      floor(mod(sysdate-bdate,7)) as days
 4  from   emp
 5  where  deptno = 10;

ENAME WEEKS DAYS

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Chris 2315 5 Peter 2971 0 Mike 2491 6 SQL> SQL> drop table emp; Table dropped.

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