Db num rows
From SA-MP Wiki
db_num_rows
Note: This function name starts with a lowercase letter. |
Description:
Returns the number of rows from a db_query
(DBResult:dbresult)
DBResult:dbresult | The result of db_query |
Return Values:
The number of rows 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:
// Example function GetNameBySpawnID(spawn_id) { // Declare "p_name" new p_name[MAX_PLAYER_NAME+1]; // Declare "query" and "db_result" static query[60], DBResult:db_result; // Formats "query" format(query, sizeof query, "SELECT `PlayerName` FROM `spawn_log` WHERE `ID`=%d", spawn_id); // Selects the player name by using "spawn_id" db_result = db_query(db_handle, query); // If there is any valid entry if(db_num_rows(db_result)) { // Store data from "PlayerName" into "p_name" db_get_field(db_result, 0, p_name, sizeof p_name); } // Frees the result db_free_result(db_result); // Returns "p_name" return p_name; }
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.