---
title: "GUID Escape Sequences | Microsoft Docs"
ms.custom: ""
ms.date: "01/19/2017"
ms.prod: sql
ms.prod_service: connectivity
ms.reviewer: ""
ms.technology: connectivity
ms.topic: conceptual
helpviewer_keywords: 
  - "ODBC escape sequences [ODBC], GUID"
  - "escape sequences [ODBC], guid"
  - "guid escape sequence [ODBC]"
ms.assetid: 71d43ef9-4a31-493e-b9e0-f864e9ef3ce6
author: David-Engel
ms.author: v-daenge
---
# GUID Escape Sequences
ODBC uses escape sequences for GUID literals. The syntax of this escape sequence is as follows:  
  
```  
{guid 'nnnnnnnn-nnnn-nnnn-nnnn-nnnnnnnnnnnn'}  
```  
  
## Remarks  
 In BNF notation, the syntax is as follows:  
  
 *ODBC-guid-escape* ::=  
     *ODBC-esc-initiator guid* '*guid-value*' *ODBC-esc-terminator*  
  
 *ODBC-esc-initiator* ::= {  
  
 *ODBC-esc-terminator* ::= }  
  
 *guid-value* ::= *clock-low-value guid-separator clock-middle-value guid-separator clock-high-value guid-separator clock-seq-value guid-separator node-value*  
  
 *guid-separator* ::= -  
  
 *clock-low-value* ::= *hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit*  
  
 *clock-middle-value* ::= *hex_digit hex_digit hex_digit hex_digit*  
  
 *clock-high-value* ::= *hex_digit hex_digit hex_digit hex_digit*  
  
 *clock-seq-value* ::= *hex_digit hex_digit hex_digit hex_digit*  
  
 *clock-node-value* ::= *hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit hex_digit*  
  
 *hex_digit* ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F  
  
 The GUID literal escape sequence is supported if the GUID data type is supported by the data source. An application should call **SQLGetTypeInfo** to determine whether this data type is supported.