diff --git a/lesson_09/types/types_app/src/main/java/com/codedifferently/lesson9/dataprovider/DavisDProvider.java b/lesson_09/types/types_app/src/main/java/com/codedifferently/lesson9/dataprovider/DavisDProvider.java
new file mode 100644
index 000000000..c0d4f3291
--- /dev/null
+++ b/lesson_09/types/types_app/src/main/java/com/codedifferently/lesson9/dataprovider/DavisDProvider.java
@@ -0,0 +1,22 @@
+package com.codedifferently.lesson9.dataprovider;
+
+import java.util.Map;
+import org.springframework.stereotype.Service;
+
+@Service
+public class DavisDProvider extends DataProvider {
+  public String getProviderName() {
+    return "davis.d";
+  }
+
+  public Map<String, Class> getColumnTypeByName() {
+    return Map.of(
+        "column1", Float.class,
+        "column2", String.class,
+        "column3", Integer.class,
+        "column4", Boolean.class,
+        "column5", Double.class,
+        "column6", Short.class,
+        "column7", Long.class);
+  }
+}
diff --git a/lesson_09/types/types_app/src/main/resources/data/davis.d.json b/lesson_09/types/types_app/src/main/resources/data/davis.d.json
new file mode 100644
index 000000000..5bf08d20e
--- /dev/null
+++ b/lesson_09/types/types_app/src/main/resources/data/davis.d.json
@@ -0,0 +1,92 @@
+[
+  {
+    "column1": "1.3252988E38",
+    "column2": "8mzt2vob",
+    "column3": "2027613001",
+    "column4": "false",
+    "column5": "1.1216302790482759E308",
+    "column6": "18869",
+    "column7": "6018622781598447616"
+  },
+  {
+    "column1": "1.6843922E38",
+    "column2": "kc7j1d5i0bqf",
+    "column3": "951808215",
+    "column4": "true",
+    "column5": "1.4241066204163272E308",
+    "column6": "32574",
+    "column7": "1973190813134214400"
+  },
+  {
+    "column1": "3.3376455E38",
+    "column2": "m51wcnopr0hx",
+    "column3": "674845807",
+    "column4": "false",
+    "column5": "1.2597285848194675E308",
+    "column6": "4248",
+    "column7": "1456560917830590976"
+  },
+  {
+    "column1": "2.6676182E38",
+    "column2": "qekas91g",
+    "column3": "860904082",
+    "column4": "false",
+    "column5": "7.398761521887835E307",
+    "column6": "24074",
+    "column7": "4478344563596579328"
+  },
+  {
+    "column1": "5.5514137E37",
+    "column2": "c4l1pr5o",
+    "column3": "1222353126",
+    "column4": "true",
+    "column5": "1.4487781392095558E308",
+    "column6": "14466",
+    "column7": "8223817051410835456"
+  },
+  {
+    "column1": "2.189322E38",
+    "column2": "l5bnz6",
+    "column3": "1900061704",
+    "column4": "false",
+    "column5": "1.2579831797633005E308",
+    "column6": "25671",
+    "column7": "552547874895547584"
+  },
+  {
+    "column1": "2.2462024E38",
+    "column2": "dm6ei1r945",
+    "column3": "1098587332",
+    "column4": "true",
+    "column5": "1.708677546140997E308",
+    "column6": "10968",
+    "column7": "7380197671755793408"
+  },
+  {
+    "column1": "3.0240185E36",
+    "column2": "k5mly3",
+    "column3": "471818338",
+    "column4": "true",
+    "column5": "1.5334348174052869E308",
+    "column6": "16966",
+    "column7": "8700824533883920384"
+  },
+  {
+    "column1": "2.693119E38",
+    "column2": "mu4n9hkfg",
+    "column3": "1505781939",
+    "column4": "false",
+    "column5": "1.119896314434982E308",
+    "column6": "5895",
+    "column7": "1829698028474462976"
+  },
+  {
+    "column1": "1.9829968E38",
+    "column2": "sovufmq",
+    "column3": "1261432633",
+    "column4": "true",
+    "column5": "1.4685563373654414E308",
+    "column6": "8828",
+    "column7": "1595283752130718208"
+  }
+]
\ No newline at end of file