Oracle PL/SQL/Date Timezone/ROUND Date

Rounding to the nearest minute

   <source lang="sql">

SQL> SQL> SQL> -- Rounding to the nearest minute. SQL> SELECT TO_CHAR(ROUND(TO_DATE("070299 01:00:35 AM", "MMDDYY HH:MI:SS AM"),

 2             "MI"), "DD-MON-YY HH:MI:SS AM") "Rounded to nearest Minute"
 3  from DUAL;

Rounded to nearest Mi

---

02-JUL-99 01:01:00 AM SQL> SQL>

      </source>
   
  

ROUND: Round a date to a particular month or year

   <source lang="sql">

SQL> SQL> -- create demo table SQL> create table Employee(

 2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
 3    First_Name         VARCHAR2(10 BYTE),
 4    Last_Name          VARCHAR2(10 BYTE),
 5    Start_Date         DATE,
 6    End_Date           DATE,
 7    Salary             Number(8,2),
 8    City               VARCHAR2(10 BYTE),
 9    Description        VARCHAR2(15 BYTE)
10  )
11  /

Table created. SQL> SQL> -- prepare data SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2               values ("01","Jason",    "Martin",  to_date("19960725","YYYYMMDD"), to_date("20060725","YYYYMMDD"), 1234.56, "Toronto",  "Programmer")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("02","Alison",   "Mathews", to_date("19760321","YYYYMMDD"), to_date("19860221","YYYYMMDD"), 6661.78, "Vancouver","Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("03","James",    "Smith",   to_date("19781212","YYYYMMDD"), to_date("19900315","YYYYMMDD"), 6544.78, "Vancouver","Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("04","Celia",    "Rice",    to_date("19821024","YYYYMMDD"), to_date("19990421","YYYYMMDD"), 2344.78, "Vancouver","Manager")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("05","Robert",   "Black",   to_date("19840115","YYYYMMDD"), to_date("19980808","YYYYMMDD"), 2334.78, "Vancouver","Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("06","Linda",    "Green",   to_date("19870730","YYYYMMDD"), to_date("19960104","YYYYMMDD"), 4322.78,"New York",  "Tester")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("07","David",    "Larry",   to_date("19901231","YYYYMMDD"), to_date("19980212","YYYYMMDD"), 7897.78,"New York",  "Manager")
 3  /

1 row created. SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description)

 2                values("08","James",    "Cat",     to_date("19960917","YYYYMMDD"), to_date("20020415","YYYYMMDD"), 1232.78,"Vancouver", "Tester")
 3  /

1 row created. SQL> SQL> SQL> SQL> -- display data in the table SQL> select * from Employee

 2  /

ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION

---

---------- ---------- --------- --------- ---------- ---------- ---------------

01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester 04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester 07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester 8 rows selected. SQL> SQL> SQL> SQL> SQL> SQL> SQL> SQL> --Round a date to a particular month or year, you can use the following query: SQL> SQL> SELECT ROUND(Start_Date,"MONTH") AS MONTH,ROUND(Start_Date,"YEAR") AS YEAR FROM Employee; MONTH YEAR

---

---------

01-AUG-96 01-JAN-97 01-APR-76 01-JAN-76 01-DEC-78 01-JAN-79 01-NOV-82 01-JAN-83 01-JAN-84 01-JAN-84 01-AUG-87 01-JAN-88 01-JAN-91 01-JAN-91 01-OCT-96 01-JAN-97 8 rows selected. SQL> SQL> SQL> -- clean the table SQL> drop table Employee

 2  /

Table dropped. SQL> SQL> SQL>

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select round( sysdate )

   <source lang="sql">

SQL> SQL> SQL> select round( sysdate )

 2  from dual
 3  /

ROUND(SYS

---

17-JUN-08 1 row selected. SQL> SQL> --

</source>
   
  

select round( sysdate, "month" )

   <source lang="sql">

SQL> SQL> select round( sysdate, "month" )

 2  from dual
 3  /

ROUND(SYS

---

01-JUL-08 1 row selected. SQL> --

</source>
   
  

select round( sysdate, "q" ) "Quarter"

   <source lang="sql">

SQL> SQL> SQL> select round( sysdate, "q" ) "Quarter"

 2  from dual
 3  /

Quarter

---

01-JUL-08 1 row selected. SQL> SQL> SQL> --

</source>
   
  

select round( sysdate, "year" )

   <source lang="sql">

SQL> SQL> select round( sysdate, "year" )

 2  from dual
 3  /

ROUND(SYS

---

01-JAN-08 1 row selected. SQL> SQL> SQL> --

</source>