Oracle PL/SQL Tutorial/Insert Update Delete/Insert Select — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
(нет различий)
|
Текущая версия на 10:07, 26 мая 2010
Insert bulk by insert ... into ... select
SQL>
SQL> CREATE TABLE project (
2 pro_id NUMBER(4),
3 pro_name VARCHAR2(40),
4 budget NUMBER(9,2),
5 CONSTRAINT project_pk PRIMARY KEY (pro_id)
6 );
Table created.
SQL>
SQL>
SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1001, "A",12345);
1 row created.
SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1002, "ERP",23456);
1 row created.
SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1003, "SQL",34567);
1 row created.
SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1004, "CRM",45678);
1 row created.
SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1005, "VPN",56789);
1 row created.
SQL>
SQL>
SQL> SET ECHO ON
SQL> INSERT INTO PROJECT (pro_id, pro_name)
2 SELECT pro_id+8000,
3 SUBSTR(pro_name,1,31) || " Overhead"
4 FROM project;
5 rows created.
SQL>
SQL>
SQL>
SQL> drop table project ;
Table dropped.
Insert into select
SQL>
SQL>
SQL> CREATE TABLE employee (
2 id number,
3 name varchar(100),
4 birth_date date,
5 gender varchar2(30) );
Table created.
SQL>
SQL>
SQL> INSERT INTO employee (id,name,birth_date,gender )
2 SELECT 200,"Chris",NULL,"MALE" from DUAL;
1 row created.
SQL>
SQL>
SQL> drop table employee;
Table dropped.
Insert into select with where clause
SQL>
SQL> CREATE TABLE employee (
2 id number,
3 name varchar(100),
4 birth_date date,
5 gender varchar2(30) );
Table created.
SQL>
SQL> INSERT INTO employee (id,name,birth_date,gender ) SELECT 300,"H",NULL,"MALE" from dual d
2 where not exists (SELECT 1 FROM employee x WHERE x.id = "300" );
1 row created.
SQL>
SQL> select * from employee;
ID
------
NAME
----------------------------------------------------------------------
BIRTH_DATE GENDER
---------- ------------------------------
300
H
null MALE
1 row selected.
SQL>
SQL>
SQL> drop table employee;
Table dropped.