Postgresql variable in query

Postgres declare variable

WITH myconstants (var1, var2) as (
   values (5, 'foo')
)
SELECT *
FROM somewhere, myconstants
WHERE something = var1
   OR something_else = var2;

Postgresql variable in query

-- with myVar as (select "any value really")
-- 		then, to get access to the value stored in this construction, you do
-- 			(select * from myVar)
-- for example

with var as (select 123)    
... where id = (select * from var)

-- You could event re-cast the value (e.g. from INT to VARCHAR) 
with var as (select 123)    
... where id = ((select * from var)::VARCHAR)

Source: stackoverflow.com

Similar codes

0 vote666 views1 answer
How to connect .sql data set to powerbi
SQL
1 vote202 views2 answers
Postgres cast as decimal
SQL
3 votes205 views1 answer
Oracle limit user tablespace
SQL
1 vote303 views1 answer
ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement
SQL
0 vote222 views1 answer
In query in sql
SQL
11 votes209 views1 answer
Sql insert multiple rows from select
SQL
0 vote196 views1 answer
SQLite3::SQLException: table "categories" already exists: CREATE TABLE "categories" ("id" integer PRIMARY KEY AUTOINCREMENT NOT NULL
SQL
17 votes205 views4 answers
Postgres list users
SQL
2 votes277 views1 answer
Get the mysql table columns data type mysql
SQL
0 vote212 views1 answer
Mysql error 1251
SQL