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

2 votes214 views4 answers
Mysql change database character set to utf8mb4
SQL
-1 vote254 views1 answer
Mysql extract days
SQL
3 votes248 views2 answers
Sqlite show table definition
SQL
0 vote260 views1 answer
Oracle sql number to varchar2
SQL
0 vote259 views2 answers
How to combine diff colmun value using group by postgres
SQL
4 votes257 views1 answer
Find tables with column name in sql
SQL
2 votes244 views1 answer
Mysql sysdate
SQL
1 vote259 views2 answers
Insert sqlite
SQL
1 vote251 views1 answer
Increase date by one day in sql oracle
SQL
0 vote248 views1 answer
Mysql return column names when table is empty
SQL