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

4 votes171 views1 answer
What are the data types
SQL
1 vote66 views1 answer
Denied
SQL
7 votes106 views2 answers
Mysql db size
SQL
10 votes105 views2 answers
Oracle alter sequence nextval
SQL
1 vote113 views1 answer
How to select multiple columns from different tables in mysql
SQL
0 vote116 views1 answer
Mysql show create db
SQL
8 votes116 views3 answers
SQL column name
SQL
5 votes109 views1 answer
Oracle list packages
SQL
1 vote111 views1 answer
Mysql column start with string
SQL
0 vote130 views1 answer
Postgres docs /copy metacomand
SQL