## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
'fontFamily': 'Arial'
}
}}%%
flowchart LR
Start((START)) --> materializeResultSet
materializeResultSet -->| | MATERIALIZE:::quoted
MATERIALIZE --> End((END))
```
## Purpose
The `materialize`-hint forces materialization of the result set from a query. It is typically used to increase performance of uncorrelated sub-queries to avoid repeated calculation of the same result set.
## Examples
The sub-query on `in` is executed only one time using `materialize`:
```sql
select *
from ExactOnlineREST..Accounts
where Id
in
( select /*+ materialize */ AccountId
from MyCustomerTable@postgresql
)
```