Problem with mysql_query and inserting variable in it via sprintf() - mysql

Question

I'm trying to insert values of temperature readed from DS18B20 sensor in mysql database using sprintf to store variables in string and mysql_query to write them in database. In database i have two column "temp" and "date", which are int and string data types.
In my previous database all was working perfect, but in this i have some problems.
Default data in columns is NOT NULL
As the result i see temperature and date in terminal, but
SELECT * FROM tmpdate1
gives me "Empty set"
Please help me to find out where the problem is and solve it
Here is my code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "libfahw.h"
#include <mysql.h>
#include <unistd.h>
#include <time.h>
#define BUF_SIZE (64)
int main(int argc, char ** argv)
{
time_t t;
char times[1024]={};
char timestr[] = {"%s"};
time(&t);
MYSQL *conn;
char query[1024]={};
char query1[1024]={};
char query_str[] = {"INSERT INTO tmpdate1(temp) VALUES (%d)"};
char query_str1[] = {"INSERT INTO tmpdate1(date) VALUES (%s)"};
if ((conn=mysql_init(NULL))==NULL)
{
fprintf(stderr, "Could not init DB\n");
return EXIT_FAILURE;
}
char temperature[BUF_SIZE];
memset(temperature, 0, BUF_SIZE);
if(mysql_real_connect(conn, "localhost", "user12", "34klq*", "defense3", 0, NULL, 0) == NULL)
{
fprintf(stderr, "DB connection error\n");
return EXIT_FAILURE;
}
for (int i = 1; i>0; i++)
{
printf("\n %d", atoi(temperature)/1000);
printf("\n %s", ctime(&t));
sprintf(times, timestr, ctime(&t));
sprintf(query, query_str, atoi(temperature)/1000);
sprintf(query1, query_str1, timestr);
mysql_query(conn, query);
mysql_query(conn, query1);
}
return 0;
}