---
title: "db_num_fields | open.mp"
description: "Get the number of fields in a result."
canonical: https://omp.itsneufox.com/th/docs/scripting/functions/db_num_fields
language: th
---

# db\_num\_fields

## คำอธิบาย

Get the number of fields in a result.

| Name | Description |
| --- | --- |
| DBResult:dbresult | The result of db\_query. |

## ส่งคืน

The number of fields in the result.

## ตัวอย่าง

```c
// ...
// Declare "db_result" and select all rows and columns from "spawn_list"
new DBResult:db_result = db_query(db_handle, "SELECT * FROM `spawn_list` WHERE 1;");

// Print the amount of columns selected
printf("Selected columns: %d", db_num_fields(db_result));

// Do...
do
{
    // ...
}

// While next row has been fetched
while (db_next_row(db_handle));

// Frees result
db_free_result(db_result);
// ...
```

## บันทึก

warning

Using an invalid handle will crash your server! Get a valid handle by using db\_query. But it's protected against NULL references.

## ฟังก์ชั่นที่เกี่ยวข้องกัน

-   db\_open: Open a connection to an SQLite database
-   db\_close: Close the connection to an SQLite database
-   db\_query: Query an SQLite database
-   db\_free\_result: Free result memory from a db\_query
-   db\_num\_rows: Get the number of rows in a result
-   db\_next\_row: Move to the next row
-   db\_num\_fields: Get the number of fields in a result
-   db\_field\_name: Returns the name of a field at a particular index
-   db\_get\_field: Get content of field with specified ID from current result row
-   db\_get\_field\_assoc: Get content of field with specified name from current result row
-   db\_get\_field\_int: Get content of field as an integer with specified ID from current result row
-   db\_get\_field\_assoc\_int: Get content of field as an integer with specified name from current result row
-   db\_get\_field\_float: Get content of field as a float with specified ID from current result row
-   db\_get\_field\_assoc\_float: Get content of field as a float with specified name from current result row
-   db\_get\_mem\_handle: Get memory handle for an SQLite database that was opened with db\_open.
-   db\_get\_result\_mem\_handle: Get memory handle for an SQLite query that was executed with db\_query.
-   db\_debug\_openfiles
-   db\_debug\_openresults