如何從SQLite3中新創建的記錄中獲取主鍵？

Question

我使用類似於下面的代碼插入記錄。插入之後，我將如何從新創建的記錄中獲取主鍵字段值？

NSString *sql1 = [NSString stringWithFormat:@"INSERT INTO mySets (myimage) VALUES ('4')"]; 
    const char *sqlstring = [sql1 UTF8String]; 
     if (sqlite3_prepare_v2(appDelegate.myDB, sqlstring, -1, &update_statement, NULL) == SQLITE_OK) { 
      int success = sqlite3_step(update_statement); 
      if (success != SQLITE_ERROR) { 
       int createdSet = sqlite3_column_int(update_statement,0); 
      } 
     } 

Answer 1

sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*); 

http://www.sqlite.org/c3ref/last_insert_rowid.html

您可能還需要檢查sqlite3_errormsg：

if (sqlite3_step(statement) != SQLITE_DONE) 
{ 
    NSLog(@"error: %@", sqlite3_errmsg(_db)); 
}