PostgreSQL/Subquery/Subquery IN

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A multi-column sub-query using IN

   <source lang="sql">

postgres=# postgres=# CREATE TABLE "editions" ( postgres(# "isbn" text NOT NULL, postgres(# "book_id" integer, postgres(# "edition" integer, postgres(# "publisher_id" integer, postgres(# "publication" date, postgres(# "type" character(1) postgres(# ); CREATE TABLE postgres=# postgres=# insert into editions values("039480001X", 1608, 1, 59, "1957-03-01", "h"); INSERT 0 1 postgres=# insert into editions values("0451160916", 7808, 1, 75, "1981-08-01", "p"); INSERT 0 1 postgres=# insert into editions values("0394800753", 1590, 1, 59, "1949-03-01", "p"); INSERT 0 1 postgres=# insert into editions values("0590445065", 25908, 1, 150, "1987-03-01", "p"); INSERT 0 1 postgres=# insert into editions values("0694003611", 1501, 1, 65, "1947-03-04", "p"); INSERT 0 1 postgres=# insert into editions values("0679803335", 1234, 1, 102, "1922-01-01", "p"); INSERT 0 1 postgres=# insert into editions values("0760720002", 190, 1, 91, "1868-01-01", "p"); INSERT 0 1 postgres=# insert into editions values("0394900014", 1608, 1, 59, "1957-01-01", "p"); INSERT 0 1 postgres=# insert into editions values("0385121679", 7808, 2, 75, "1993-10-01", "h"); INSERT 0 1 postgres=# insert into editions values("1885418035", 156, 1, 163, "1995-03-28", "p"); INSERT 0 1 postgres=# insert into editions values("0929605942", 156, 2, 171, "1998-12-01", "p"); INSERT 0 1 postgres=# insert into editions values("0441172717", 4513, 2, 99, "1998-09-01", "p"); INSERT 0 1 postgres=# insert into editions values("044100590X", 4513, 3, 99, "1999-10-01", "h"); INSERT 0 1 postgres=# insert into editions values("0451457994", 4267, 3, 101, "2000-09-12", "p"); INSERT 0 1 postgres=# insert into editions values("0451198492", 4267, 3, 101, "1999-10-01", "h"); INSERT 0 1 postgres=# insert into editions values("0823015505", 2038, 1, 62, "1958-01-01", "p"); INSERT 0 1 postgres=# insert into editions values("0596000855", 41473, 2, 113, "2001-03-01", "p"); INSERT 0 1 postgres=# postgres=# select * from editions;

   isbn    | book_id | edition | publisher_id | publication | type

+---------+---------+--------------+-------------+------
039480001X |    1608 |       1 |           59 | 1957-03-01  | h
0451160916 |    7808 |       1 |           75 | 1981-08-01  | p
0394800753 |    1590 |       1 |           59 | 1949-03-01  | p
0590445065 |   25908 |       1 |          150 | 1987-03-01  | p
0694003611 |    1501 |       1 |           65 | 1947-03-04  | p
0679803335 |    1234 |       1 |          102 | 1922-01-01  | p
0760720002 |     190 |       1 |           91 | 1868-01-01  | p
0394900014 |    1608 |       1 |           59 | 1957-01-01  | p
0385121679 |    7808 |       2 |           75 | 1993-10-01  | h
1885418035 |     156 |       1 |          163 | 1995-03-28  | p
0929605942 |     156 |       2 |          171 | 1998-12-01  | p
0441172717 |    4513 |       2 |           99 | 1998-09-01  | p
044100590X |    4513 |       3 |           99 | 1999-10-01  | h
0451457994 |    4267 |       3 |          101 | 2000-09-12  | p
0451198492 |    4267 |       3 |          101 | 1999-10-01  | h
0823015505 |    2038 |       1 |           62 | 1958-01-01  | p
0596000855 |   41473 |       2 |          113 | 2001-03-01  | p

(17 rows) postgres=# postgres=# CREATE TABLE "stock" ( postgres(# "isbn" text NOT NULL, postgres(# "cost" numeric(5,2), postgres(# "retail" numeric(5,2), postgres(# "stock" integer, postgres(# Constraint "stock_pkey" Primary Key ("isbn") postgres(# ); NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "stock_pkey" for table "stock" CREATE TABLE postgres=# postgres=# postgres=# insert into stock values ("0385121679", 29.00, 36.95, 65); INSERT 0 1 postgres=# insert into stock values ("039480001X", 30.00, 32.95, 31); INSERT 0 1 postgres=# insert into stock values ("0394900014", 23.00, 23.95, 0); INSERT 0 1 postgres=# insert into stock values ("044100590X", 36.00, 45.95, 89); INSERT 0 1 postgres=# insert into stock values ("0441172717", 17.00, 21.95, 77); INSERT 0 1 postgres=# insert into stock values ("0451160916", 24.00, 28.95, 22); INSERT 0 1 postgres=# insert into stock values ("0451198492", 36.00, 46.95, 0); INSERT 0 1 postgres=# insert into stock values ("0451457994", 17.00, 22.95, 0); INSERT 0 1 postgres=# insert into stock values ("0590445065", 23.00, 23.95, 10); INSERT 0 1 postgres=# insert into stock values ("0679803335", 20.00, 24.95, 18); INSERT 0 1 postgres=# insert into stock values ("0694003611", 25.00, 28.95, 50); INSERT 0 1 postgres=# insert into stock values ("0760720002", 18.00, 23.95, 28); INSERT 0 1 postgres=# insert into stock values ("0823015505", 26.00, 28.95, 16); INSERT 0 1 postgres=# insert into stock values ("0929605942", 19.00, 21.95, 25); INSERT 0 1 postgres=# insert into stock values ("1885418035", 23.00, 24.95, 77); INSERT 0 1 postgres=# insert into stock values ("0394800753", 16.00, 16.95, 4); INSERT 0 1 postgres=# postgres=# select * FROM stock;

   isbn    | cost  | retail | stock

+-------+--------+-------
0385121679 | 29.00 |  36.95 |    65
039480001X | 30.00 |  32.95 |    31
0394900014 | 23.00 |  23.95 |     0
044100590X | 36.00 |  45.95 |    89
0441172717 | 17.00 |  21.95 |    77
0451160916 | 24.00 |  28.95 |    22
0451198492 | 36.00 |  46.95 |     0
0451457994 | 17.00 |  22.95 |     0
0590445065 | 23.00 |  23.95 |    10
0679803335 | 20.00 |  24.95 |    18
0694003611 | 25.00 |  28.95 |    50
0760720002 | 18.00 |  23.95 |    28
0823015505 | 26.00 |  28.95 |    16
0929605942 | 19.00 |  21.95 |    25
1885418035 | 23.00 |  24.95 |    77
0394800753 | 16.00 |  16.95 |     4

(16 rows) postgres=# postgres=# postgres=# -- A multi-column sub-query using IN postgres=# postgres=# SELECT isbn, cost, retail FROM stock postgres-# WHERE (isbn, stock) postgres-# IN (SELECT isbn, 0 FROM editions postgres(# WHERE type = "p");

   isbn    | cost  | retail

+-------+--------
0451457994 | 17.00 |  22.95
0394900014 | 23.00 |  23.95

(2 rows) postgres=# postgres=# drop table stock; DROP TABLE postgres=# drop table editions; DROP TABLE postgres=#

      </source>
   
  


A sub-query using IN

   <source lang="sql">

postgres=# postgres=# create table job( postgres(# ID int, postgres(# title varchar (10)); CREATE TABLE postgres=# postgres=# postgres=# insert into job(ID, title) values(1,"Developer"); INSERT 0 1 postgres=# insert into job(ID, title) values(2,"Tester"); INSERT 0 1 postgres=# insert into job(ID, title) values(3,"Designer"); INSERT 0 1 postgres=# insert into job(ID, title) values(4,"Programmer"); INSERT 0 1 postgres=# postgres=# select * from job;

id |   title

+------------
 1 | Developer
 2 | Tester
 3 | Designer
 4 | Programmer

(4 rows) 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=# postgres=# -- A sub-query using IN postgres=# postgres=# SELECT name FROM employee WHERE id IN (SELECT id FROM job WHERE title ~ "^[A-E]");

name

Jason
Celia

(2 rows) postgres=# postgres=# postgres=# postgres=# drop table employee; DROP TABLE postgres=# drop table job; DROP TABLE postgres=# postgres=# postgres=#

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