Added sqlite example. Needs comments

examples/CMakeLists.txt

@@ -111,4 +111,8 @@ if (OpenCV_FOUND)
 endif()
 
 
+if (DLIB_LINK_WITH_SQLITE3)
+   add_example(sqlite_ex)
+endif()
+
 

examples/sqlite_ex.cpp

+// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
+
+/*
+*/
+
+
+#include <iostream>
+#include <dlib/sqlite.h>
+#include <dlib/matrix.h>
+
+using namespace dlib;
+using namespace std;
+
+// ----------------------------------------------------------------------------------------
+bool table_exists (
+    database& db,
+    const std::string& tablename
+)
+{
+    return query_int(db, "select count(*) from sqlite_master where name = '"+tablename+"'")==1;
+}
+
+int main() try
+{
+
+    database db("stuff.db");
+
+    if (!table_exists(db,"davis"))
+        db.exec("create table davis (name, age, data)");
+
+    statement st(db, "insert into davis VALUES(?,?,?)");
+
+    string name = "davis";
+    int age = 32;
+    matrix<double> m = randm(3,3);
+
+    st.bind(1, name);
+    st.bind(2, age);
+    st.bind(3, m);
+    st.exec();
+
+
+
+    statement st2(db, "select * from davis");
+    st2.exec();
+    while(st2.move_next())
+    {
+        string name;
+        int age;
+        matrix<double> m;
+        st2.get_column(0, name);
+        st2.get_column(1, age);
+        st2.get_column(2, m);
+        cout << name << " " << age << "\n" << m << endl << endl;
+    }
+
+}
+catch (std::exception& e)
+{
+    cout << e.what() << endl;
+}
+
+// ----------------------------------------------------------------------------------------
+
+