в 13:45, 26 мая 2010

2010-05-26T13:45:56Z

Admin: 1 версия

2010-05-26T10:14:13Z

1 версия

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==Insert into by select statement==



<source lang="sql">

postgres=#
postgres=# CREATE TABLE employee (
postgres(# ID int,
postgres(# name varchar(10),
postgres(# salary real,
postgres(# start_date date,
postgres(# city varchar(10),
postgres(# region char(1)
postgres(# );
CREATE TABLE
postgres=#
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (1, "Jason", 40420, "02/01/94", "New York", "W");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (2, "Robert",14420, "01/02/95", "Vancouver","N");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (3, "Celia", 24020, "12/03/96", "Toronto", "W");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (4, "Linda", 40620, "11/04/97", "New York", "N");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (5, "David", 80026, "10/05/98", "Vancouver","W");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (6, "James", 70060, "09/06/99", "Toronto", "N");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (7, "Alison",90620, "08/07/00", "New York", "W");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (8, "Chris", 26020, "07/08/01", "Vancouver","N");
INSERT 0 1
postgres=# insert into employee (ID, name, salary, start_date, city, region)
postgres-# values (9, "Mary", 60020, "06/09/02", "Toronto", "W");
INSERT 0 1
postgres=#
postgres=# select * from employee;
id | name | salary | start_date | city | region
----+--------+--------+------------+-----------+--------
1 | Jason | 40420 | 1994-02-01 | New York | W
2 | Robert | 14420 | 1995-01-02 | Vancouver | N
3 | Celia | 24020 | 1996-12-03 | Toronto | W
4 | Linda | 40620 | 1997-11-04 | New York | N
5 | David | 80026 | 1998-10-05 | Vancouver | W
6 | James | 70060 | 1999-09-06 | Toronto | N
7 | Alison | 90620 | 2000-08-07 | New York | W
8 | Chris | 26020 | 2001-07-08 | Vancouver | N
9 | Mary | 60020 | 2002-06-09 | Toronto | W
(9 rows)
postgres=#
postgres=# CREATE TABLE employee_backup (
postgres(# ID int,
postgres(# name varchar(10),
postgres(# salary real,
postgres(# start_date date,
postgres(# city varchar(10),
postgres(# region char(1)
postgres(# );
CREATE TABLE
postgres=#
postgres=# INSERT INTO employee_backup SELECT * FROM employee;
INSERT 0 9
postgres=#
postgres=# select * from employee_backup;
id | name | salary | start_date | city | region
----+--------+--------+------------+-----------+--------
1 | Jason | 40420 | 1994-02-01 | New York | W
2 | Robert | 14420 | 1995-01-02 | Vancouver | N
3 | Celia | 24020 | 1996-12-03 | Toronto | W
4 | Linda | 40620 | 1997-11-04 | New York | N
5 | David | 80026 | 1998-10-05 | Vancouver | W
6 | James | 70060 | 1999-09-06 | Toronto | N
7 | Alison | 90620 | 2000-08-07 | New York | W
8 | Chris | 26020 | 2001-07-08 | Vancouver | N
9 | Mary | 60020 | 2002-06-09 | Toronto | W
(9 rows)
postgres=#
postgres=# drop table employee;
DROP TABLE
postgres=# drop table employee_backup;
DROP TABLE
postgres=#
postgres=#

</source>

==INSERT INTO vv SELECT "abc" || "def"==



<source lang="sql">

postgres=#
postgres=# CREATE TABLE vv (v character(20));
CREATE TABLE
postgres=#
postgres=# INSERT INTO vv SELECT "abc" || "def";
INSERT 0 1
postgres=# SELECT v, length(v) FROM vv;
v | length
----------------------+--------
abcdef | 6
(1 row)
postgres=#
postgres=# drop table vv;
DROP TABLE
postgres=#

</source>

==Restructuring a table with CREATE TABLE and INSERT INTO==



<source lang="sql">
postgres=# CREATE TABLE books (
postgres(# id integer UNIQUE,
postgres(# title text NOT NULL,
postgres(# author_id integer,
postgres(# subject_id integer);
NOTICE: CREATE TABLE / UNIQUE will create implicit index "books_id_key" for table "books"
CREATE TABLE
postgres=#
postgres=#
postgres=# insert into books values(7808, "Java", 4156, 9);
INSERT 0 1
postgres=# insert into books values(4513, "Javascript", 1866, 15);
INSERT 0 1
postgres=# insert into books values(4267, "C#", 2001, 15);
INSERT 0 1
postgres=# insert into books values(1608, "Oracle", 1809, 2);
INSERT 0 1
postgres=# insert into books values(1590, "Sql Server", 1809, 2);
INSERT 0 1
postgres=# insert into books values(25908, "Postgre SQL", 15990, 2);
INSERT 0 1
postgres=# insert into books values(1501, "Python", 2031, 2);
INSERT 0 1
postgres=# insert into books values(190, "Java by API", 16, 6);
INSERT 0 1
postgres=#
postgres=#
postgres=# select * from books;
id | title | author_id | subject_id
-------+-------------+-----------+------------
7808 | Java | 4156 | 9
4513 | Javascript | 1866 | 15
4267 | C# | 2001 | 15
1608 | Oracle | 1809 | 2
1590 | Sql Server | 1809 | 2
25908 | Postgre SQL | 15990 | 2
1501 | Python | 2031 | 2
190 | Java by API | 16 | 6
(8 rows)
postgres=#
postgres=# --Restructuring a table with CREATE TABLE and INSERT INTO
postgres=#
postgres=# CREATE TABLE new_books (
postgres(# id integer UNIQUE,
postgres(# title text NOT NULL,
postgres(# author_id integer,
postgres(# subject_id integer
postgres(# );
NOTICE: CREATE TABLE / UNIQUE will create implicit index "new_books_id_key" for table "new_books"
CREATE TABLE
postgres=#
postgres=# INSERT INTO new_books
postgres-# SELECT id, title, author_id, subject_id
postgres-# FROM books;
INSERT 0 8
postgres=#
postgres=# ALTER TABLE books RENAME TO old_books;
ALTER TABLE
postgres=#
postgres=# ALTER TABLE new_books RENAME TO books;
ALTER TABLE
postgres=#
postgres=# drop table books;
DROP TABLE
postgres=# drop table old_books;
DROP TABLE
postgres=#
postgres=#

</source>

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PostgreSQL/Insert Delete Update/Insert Select - История изменений

в 13:45, 26 мая 2010

Admin: 1 версия