Oracle PL/SQL Tutorial/Table/Merge
Содержание
MERGE INTO
<source lang="sql">
SQL> SQL> SQL> -- create demo table SQL> create table Employee(
2 ID VARCHAR2(4 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 /
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> create table new_employee as select * from employee; create table new_employee as select * from employee
SQL> SQL> update new_employee set salary = salary +1; 8 rows updated. SQL> SQL> update new_employee set id = id +1; 8 rows updated. SQL> SQL> select * from new_employee; ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION
-------------------- -------------------- --------- --------- ---------- ---------- ---------------
3 Jason Martin 25-JUL-96 25-JUL-06 1236.56 Toronto Programmer 4 Alison Mathews 21-MAR-76 21-FEB-86 6663.78 Vancouver Tester 5 James Smith 12-DEC-78 15-MAR-90 6546.78 Vancouver Tester 6 Celia Rice 24-OCT-82 21-APR-99 2346.78 Vancouver Manager 7 Robert Black 15-JAN-84 08-AUG-98 2336.78 Vancouver Tester 8 Linda Green 30-JUL-87 04-JAN-96 4324.78 New York Tester 9 David Larry 31-DEC-90 12-FEB-98 7899.78 New York Manager 10 James Cat 17-SEP-96 15-APR-02 1234.78 Vancouver Tester 8 rows selected. SQL> SQL> SQL> SQL> MERGE INTO employee e
2 USING new_employee ne ON ( 3 e.id = ne.id 4 ) 5 WHEN NOT MATCHED THEN 6 INSERT (e.id, e.first_name, e.last_name, e.description, e.salary) 7 VALUES (ne.id,ne.first_name,ne.last_name,ne.description,ne.salary);
8 rows merged. SQL> SQL> select * from employee; 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 3 Jason Martin 1236.56 Programmer 4 Alison Mathews 6663.78 Tester 5 James Smith 6546.78 Tester 6 Celia Rice 2346.78 Manager 7 Robert Black 2336.78 Tester 8 Linda Green 4324.78 Tester 9 David Larry 7899.78 Manager 10 James Cat 1234.78 Tester 16 rows selected. SQL> SQL> drop table new_employee; Table dropped. SQL> SQL> SQL> -- clean the table SQL> drop table Employee
2 /
Table dropped. SQL></source>
Merge table
<source lang="sql">
SQL> SQL> create table myTable
2 (pid number, sales number, status varchar2(6));
Table created. SQL> SQL> create table myTable2
2 (pid number, sales number, status varchar2(6));
Table created. SQL> SQL> insert into myTable2 values(1,12,"CURR"); 1 row created. SQL> insert into myTable2 values(2,13,"NEW" ); 1 row created. SQL> insert into myTable2 values(3,15,"CURR"); 1 row created. SQL> SQL> insert into myTable values(2,24,"CURR"); 1 row created. SQL> insert into myTable values(3, 0,"OBS" ); 1 row created. SQL> insert into myTable values(4,42,"CURR"); 1 row created. SQL> SQL> select * from myTable2;
PID SALES STATUS
---------- ------
1 12 CURR
2 13 NEW
3 15 CURR
SQL> select * from myTable;
PID SALES STATUS
---------- ------
2 24 CURR
3 0 OBS
4 42 CURR
SQL> SQL> merge into myTable2 m
2 using myTable d 3 on (m.pid = d.pid) 4 when matched 5 then update set m.sales = m.sales+d.sales 6 , m.status = d.status 7 delete where m.status = "OBS" 8 when not matched 9 then insert values (d.pid,d.sales,"NEW");
3 rows merged. SQL> SQL> select * from myTable2;
PID SALES STATUS
---------- ------
1 12 CURR
2 37 CURR
4 42 NEW
SQL> SQL> SQL> drop table myTable; Table dropped. SQL> drop table myTable2; Table dropped. SQL></source>
Merge table into another table
<source lang="sql">
SQL> create table student_emails_ext
2 (firstname varchar(40), 3 lastname varchar(40), 4 email varchar(80) );
Table created. SQL> SQL> create table student_emails
2 as select * from student_emails_ext 3 where 0=1 4 /
Table created. SQL> SQL> SQL> merge into student_emails s
2 using (select * from student_emails_ext) e 3 on (s.firstname = e.firstname and s.lastname = e.lastname) 4 when matched then 5 update set s.email = e.email 6 when not matched then 7 insert (s.firstname, s.lastname, s.email) 8 values(e.firstname , e.lastname, e.email);
0 rows merged. SQL> SQL> drop table student_emails_ext; Table dropped. SQL> drop table student_emails; Table dropped.</source>
Merge two tables and map columns
<source lang="sql">
SQL> SQL> -- create demo table SQL> create table emp(
2 ID VARCHAR2(4 BYTE) NOT NULL, 3 fname VARCHAR2(10 BYTE), 4 lname 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp
2 /
ID FNAME LNAME 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
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
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
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
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> create table new_emp as select * from emp; Table created. SQL> SQL> update new_emp set salary = salary +1; 8 rows updated. SQL> update new_emp set id = id +1; 8 rows updated. SQL> SQL> select * from new_emp; ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
2 Jason Martin 25-JUL-96 25-JUL-06 1235.56 Toronto Programmer 3 Alison Mathews 21-MAR-76 21-FEB-86 6662.78 Vancouver Tester 4 James Smith 12-DEC-78 15-MAR-90 6545.78 Vancouver Tester
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
5 Celia Rice 24-OCT-82 21-APR-99 2345.78 Vancouver Manager 6 Robert Black 15-JAN-84 08-AUG-98 2335.78 Vancouver Tester 7 Linda Green 30-JUL-87 04-JAN-96 4323.78 New York Tester
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
8 David Larry 31-DEC-90 12-FEB-98 7898.78 New York Manager 9 James Cat 17-SEP-96 15-APR-02 1233.78 Vancouver Tester
8 rows selected. SQL> SQL> --Merging Rows Using MERGE SQL> --merge rows from one table into another SQL> SQL> MERGE INTO emp e
2 USING new_emp ne ON (e.id = ne.id) 3 WHEN NOT MATCHED THEN 4 INSERT (e.id, e.fname, e.lname, e.description, e.salary)VALUES(ne.id,ne.fna
me,ne.lname,ne.description,ne.salary); 8 rows merged. SQL> SQL> -- clean the table SQL> drop table new_emp; Table dropped. SQL> drop table emp
2 /
Table dropped. SQL> SQL></source>
Merge two tables when matched or not matched
<source lang="sql">
SQL> SQL> SQL> create table myTable(pid number, sales number, status varchar2(6)); Table created. SQL> create table master_tab(pid number, sales number, status varchar2(6)); Table created. SQL> SQL> insert into master_tab values(1,12,"CURR"); 1 row created. SQL> insert into master_tab values(2,13,"NEW" ); 1 row created. SQL> insert into master_tab values(3,15,"CURR"); 1 row created. SQL> SQL> insert into myTable values(2,24,"CURR"); 1 row created. SQL> insert into myTable values(3, 0,"OBS" ); 1 row created. SQL> insert into myTable values(4,42,"CURR"); 1 row created. SQL> SQL> SQL> merge into master_tab m
2 using myTable d 3 on (m.pid = d.pid) 4 when matched 5 then update set m.sales = m.sales+d.sales 6 , m.status = d.status 7 delete where m.status = "OBS" 8 when not matched 9 then insert values (d.pid,d.sales,"NEW");
3 rows merged. SQL> SQL> select * from master_tab;
PID SALES STATUS
---------- ------
1 12 CURR
2 37
4 42 NEW
SQL> SQL> SQL> SQL> drop table myTable; Table dropped. SQL> drop table master_tab; Table dropped. SQL></source>
Merge two tables with update
<source lang="sql">
SQL> SQL> -- create demo table SQL> create table emp(
2 ID VARCHAR2(4 BYTE) NOT NULL, 3 fname VARCHAR2(10 BYTE), 4 lname 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp(ID, fname, lname, 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 emp
2 /
ID FNAME LNAME 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
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
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
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
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> create table new_emp as select * from emp; Table created. SQL> SQL> update new_emp set salary = salary +1; 8 rows updated. SQL> SQL> select * from new_emp; ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
01 Jason Martin 25-JUL-96 25-JUL-06 1235.56 Toronto Programmer 02 Alison Mathews 21-MAR-76 21-FEB-86 6662.78 Vancouver Tester 03 James Smith 12-DEC-78 15-MAR-90 6545.78 Vancouver Tester
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
04 Celia Rice 24-OCT-82 21-APR-99 2345.78 Vancouver Manager 05 Robert Black 15-JAN-84 08-AUG-98 2335.78 Vancouver Tester 06 Linda Green 30-JUL-87 04-JAN-96 4323.78 New York Tester
ID FNAME LNAME START_DAT END_DATE SALARY CITY
---------- ---------- --------- --------- ---------- ----------
DESCRIPTION
07 David Larry 31-DEC-90 12-FEB-98 7898.78 New York Manager 08 James Cat 17-SEP-96 15-APR-02 1233.78 Vancouver Tester
8 rows selected. SQL> SQL> --Merging Rows Using MERGE SQL> --merge rows from one table into another SQL> SQL> MERGE INTO emp e
2 USING new_emp ne ON (e.id = ne.id) 3 WHEN MATCHED THEN UPDATE SET e.salary = ne.salary;
8 rows merged. SQL> SQL> SQL> -- clean the table SQL> drop table new_emp; Table dropped. SQL> drop table emp
2 /
Table dropped. SQL></source>
Merge with match
<source lang="sql">
SQL> SQL> -- create demo table SQL> create table Employee(
2 ID VARCHAR2(4 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 /
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> create table new_employee as select * from employee; Table created. SQL> SQL> update new_employee set salary = salary +1; 8 rows updated. SQL> SQL> update new_employee set id = id +1; 8 rows updated. SQL> SQL> select * from new_employee; ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION
-------------------- -------------------- --------- --------- ---------- ---------- ---------------
2 Jason Martin 25-JUL-96 25-JUL-06 1235.56 Toronto Programmer 3 Alison Mathews 21-MAR-76 21-FEB-86 6662.78 Vancouver Tester 4 James Smith 12-DEC-78 15-MAR-90 6545.78 Vancouver Tester 5 Celia Rice 24-OCT-82 21-APR-99 2345.78 Vancouver Manager 6 Robert Black 15-JAN-84 08-AUG-98 2335.78 Vancouver Tester 7 Linda Green 30-JUL-87 04-JAN-96 4323.78 New York Tester 8 David Larry 31-DEC-90 12-FEB-98 7898.78 New York Manager 9 James Cat 17-SEP-96 15-APR-02 1233.78 Vancouver Tester 8 rows selected. SQL> SQL> SQL> SQL> --Merging Rows Using MERGE SQL> --merge rows from one table into another SQL> SQL> MERGE INTO employee e
2 USING new_employee ne ON ( 3 e.id = ne.id 4 ) 5 WHEN MATCHED THEN 6 UPDATE 7 SET 8 e.salary = ne.salary;
0 rows merged. SQL> SQL> SQL> -- clean the table SQL> drop table Employee
2 /
Table dropped. SQL></source>
