## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
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}}%%
flowchart LR
Start((START)) --> QUOTE_IDENT[QUOTE_IDENT]:::quoted
QUOTE_IDENT --> End((END))
```
## Purpose
The `QUOTE_IDENT` SQL function quotes a text for use as an identifier within an SQL query. Double quotes are added when the text contains upper case or non-alphanumeric characters; otherwise the text is returned unchanged.
See also [[QUOTE_LITERAL]] and [[QUOTE_NULLABLE]].
Parameters:
- Identifier (`varchar2`): the text to quote.
Returns: the quoted identifier as `varchar2`. Returns `null` when the input is `null` or empty.
## Examples
The following example quotes `abc`; no quotes are needed:
```sql
select quote_ident('abc')
-------------------
abc
```
The following example quotes `A`; quotes are added since the text contains an upper case character:
```sql
select quote_ident('A')
-------------------
"A"
```
The following example quotes a text with spaces:
```sql
select quote_ident('select * from dummy_string')
----------------------------
"select * from dummy_string"
```