How save images on SQL database in C++

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C++

SQL

OpenCV

I had some processing code to detect the faces using opencv and c++ console application .its work nicely and capured images save on project folder.now i want save that images on local sql data base . How i do it. That local database also in my project folder.
Thank you

What I have tried:

i tried sqlite. But below example always says connection successful even database deletefrom the souse folder. Its seem not work.

#include <stdio.h>
#include <sqlite3.h>
int main ( int argc , char * argv [])
{
   sqlite3 * db ;
char * zErrMsg = 0 ;
int rc ;
rc = sqlite3_open ( "test.db" , & db);
if ( rc ){
fprintf ( stderr , "Can't open database:
return ( 0 );
} else {
fprintf ( stderr , "Opened database succes
}
sqlite3_close ( db);
}