Use TO_DATE('December 31, 2005, 11:30 P.M.','Month dd, YYYY, HH:MI P.M.') in update statement : Update « Insert Update Delete « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Insert Update Delete » Update 
4. 3. 7. Use TO_DATE('December 31, 2005, 11:30 P.M.','Month dd, YYYY, HH:MI P.M.') in update statement
SQL>
SQL>
SQL> -- create demo table
SQL> create table Employee(
  2    ID                 VARCHAR2(BYTE)         NOT NULL primary key,
  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  /

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  /

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  /

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  /

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  /

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  /

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  /

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  /

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

rows selected.

SQL>
SQL>
SQL>
SQL> UPDATE employee
  2  SET    start_date = TO_DATE('December 31200511:30 P.M.',
  3                                   'Month dd, YYYY, HH:MI P.M.');

rows updated.

SQL>
SQL> select from employee;

ID   FIRST_NAME LAST_NAME  START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     31-DEC-05 25-JUL-06    1234.56 Toronto    Programmer
02   Alison     Mathews    31-DEC-05 21-FEB-86    6661.78 Vancouver  Tester
03   James      Smith      31-DEC-05 15-MAR-90    6544.78 Vancouver  Tester
04   Celia      Rice       31-DEC-05 21-APR-99    2344.78 Vancouver  Manager
05   Robert     Black      31-DEC-05 08-AUG-98    2334.78 Vancouver  Tester
06   Linda      Green      31-DEC-05 04-JAN-96    4322.78 New York   Tester
07   David      Larry      31-DEC-05 12-FEB-98    7897.78 New York   Manager
08   James      Cat        31-DEC-05 15-APR-02    1232.78 Vancouver  Tester

rows selected.

SQL>
SQL> -- clean the table
SQL> drop table Employee
  2  /

Table dropped.
4. 3. Update
4. 3. 1. Modifying Rows Using the UPDATE Statement
4. 3. 2. Change more than one column value in update statement
4. 3. 3. If the WHERE clause were omitted, all the rows would be updated.
4. 3. 4. Change multiple rows and multiple columns in the same UPDATE statement
4. 3. 5. Use function in set clause
4. 3. 6. Writing an UPDATE Statement Containing a Subquery
4. 3. 7. Use TO_DATE('December 31, 2005, 11:30 P.M.','Month dd, YYYY, HH:MI P.M.') in update statement
4. 3. 8. Set clause with math expression
4. 3. 9. Update with subquery
4. 3. 10. Update a subquery
4. 3. 11. Set value based on a select statement
4. 3. 12. Change department name to lower case
4. 3. 13. Update data from existing column
4. 3. 14. Update four columns
4. 3. 15. Update one row
4. 3. 16. Update salary based on average salary
4. 3. 17. Update the emp table, converting emp names to uppercase
4. 3. 18. subquery in update statement
4. 3. 19. To update the salary of all emps to the maximum salary in the corresponding department (correlated subquery):
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