PostgreSQL/String Functions/to char
Содержание
If space is not enough for display
<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=# SELECT salary * 100 AS New_Salary, postgres-# to_char(salary * 100, "$99,999.99") AS monetary, postgres-# translate(to_char(salary * 100, "$9,999.99")," ","") AS translated postgres-# FROM employee postgres-# LIMIT 3;
new_salary | monetary | translated
+-------------+------------
4042000 | $ ##,###.## | $#,###.## 1442000 | $ ##,###.## | $#,###.## 2402000 | $ ##,###.## | $#,###.##
(3 rows) postgres=# postgres=# drop table employee; DROP TABLE postgres=#
</source>
to_char(1.0, "9th "Place"")
<source lang="sql">
postgres=# SELECT to_char(1.0, "9th "Place"") AS first, postgres-# to_char(2.2, "9th "Place"") AS second, postgres-# to_char(pi(), "9th "Place"") AS third, postgres-# to_char(10, "99V99th "\\"Place\\""") AS shifted_up;
first | second | third | shifted_up
+------------+------------+-----------------
1st Place | 2nd Place | 3rd Place | 990th "Place"
(1 row) postgres=#
</source>
to_char(123456789, "00999999999")
<source lang="sql">
postgres=# SELECT to_char(123456789, "999G999G999D99") AS formatted, postgres-# to_char(123456789, "999999999") AS just_digits, postgres-# to_char(123456789, "00999999999") AS with_zeroes;
formatted | just_digits | with_zeroes
+-------------+--------------
123,456,789.00 | 123456789 | 00123456789
(1 row) postgres=# postgres=#
</source>
to_char(123456789, "999999999")
<source lang="sql">
postgres=# SELECT to_char(123456789, "999G999G999D99") AS formatted, postgres-# to_char(123456789, "999999999") AS just_digits, postgres-# to_char(123456789, "00999999999") AS with_zeroes;
formatted | just_digits | with_zeroes
+-------------+--------------
123,456,789.00 | 123456789 | 00123456789
(1 row) postgres=# postgres=#
</source>
to_char(123456789, "999G999G999D99")
<source lang="sql">
postgres=# SELECT to_char(123456789, "999G999G999D99") AS formatted, postgres-# to_char(123456789, "999999999") AS just_digits, postgres-# to_char(123456789, "00999999999") AS with_zeroes;
formatted | just_digits | with_zeroes
+-------------+--------------
123,456,789.00 | 123456789 | 00123456789
(1 row) postgres=# postgres=#
</source>
to_char: convert number to char
<source lang="sql">
postgres=# postgres=# postgres=# CREATE TABLE money_example ( postgres(# money_cash money, postgres(# numeric_cash numeric(10,2)); CREATE TABLE postgres=# postgres=# INSERT INTO money_example VALUES ("$12.24", 12.24); INSERT 0 1 postgres=# postgres=# postgres=# SELECT money_cash, "$" || ltrim(to_char(numeric_cash, "9999.99")) postgres-# AS numeric_cashified postgres-# FROM money_example;
money_cash | numeric_cashified
+-------------------
$12.24 | $12.24
(1 row) postgres=# postgres=# drop table money_example; DROP TABLE postgres=#
</source>
to_char(start_date, "YYYY-MM-DD HH24:MI:SS")
<source lang="sql">
postgres=# postgres=# 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 | 01.02.1994 | New York | W 2 | Robert | 14420 | 02.01.1995 | Vancouver | N 3 | Celia | 24020 | 03.12.1996 | Toronto | W 4 | Linda | 40620 | 04.11.1997 | New York | N 5 | David | 80026 | 05.10.1998 | Vancouver | W 6 | James | 70060 | 06.09.1999 | Toronto | N 7 | Alison | 90620 | 07.08.2000 | New York | W 8 | Chris | 26020 | 08.07.2001 | Vancouver | N 9 | Mary | 60020 | 09.06.2002 | Toronto | W
(9 rows) postgres=# postgres=# postgres=# SELECT to_char(start_date, "YYYY-MM-DD HH24:MI:SS") AS value FROM employee;
value
1994-02-01 00:00:00 1995-01-02 00:00:00 1996-12-03 00:00:00 1997-11-04 00:00:00 1998-10-05 00:00:00 1999-09-06 00:00:00 2000-08-07 00:00:00 2001-07-08 00:00:00 2002-06-09 00:00:00
(9 rows) postgres=# postgres=# postgres=# drop table employee; DROP TABLE postgres=#
</source>
