Db num fields
From SA-MP Wiki
db_num_fields
Note: This function name starts with a lowercase letter. |
Description:
Get the number of fields in a result.
(DBResult:dbresult)
DBResult:dbresult | The result of db_query. |
Return Values:
The number of fields in the result.
Warning | Using an invalid handle will crash your server! Get a valid handle by using db_query. But it's protected against NULL references. |
Example Usage:
// ... // 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); // ...
Related Functions
The following functions may be useful, as they are related to this function in one way or another.
- 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.