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 vote387 views1 answer
Mysql get hour from datetime
SQL
0 vote392 views2 answers
Mysql two column combination unique
SQL
1 vote355 views1 answer
Sample clause in sql
SQL
0 vote403 views1 answer
MySQL - Enabling the Event Scheduler
SQL
5 votes394 views1 answer
Purge undo tablespace usage
SQL
12 votes345 views1 answer
How to change the value of a table in sql
SQL
0 vote382 views2 answers
Uninstall postgresql mac
SQL
103 votes574 views2 answers
Sql server LIKE '%%'
SQL
0 vote360 views1 answer
Alter owner in PostgreSQL
SQL
1 vote370 views4 answers
Sql now
SQL