cleanup + formatting + adding part table for ephys

Author: Thinh Nguyen

01-Getting started with DataJoint - Completed.ipynb

@@ -1749,7 +1749,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Querying data"
+    "# Querying data from a single table"
    ]
   },
   {
@@ -1767,7 +1767,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Restricting by attribute value"
+    "## Restrictions (`&`) - filter data with certain conditions"
    ]
   },
   {
@@ -3117,7 +3117,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Negative restriction - with the `-` operator"
+    "## Negative restriction (`-`) - filter out data"
    ]
   },
   {
@@ -3464,85 +3464,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Deleting entries"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "Now we have a good idea on how to restrict table entries, this is a good time to introduce how to **delete** entries from a table."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "To delete a specific entry, you restrict the table down to the target entry, and call `delete` method."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 45,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "About to delete:\n",
-      "`test_`.`mouse`: 1 items\n",
-      "Proceed? [yes, No]: yes\n",
-      "Committed.\n"
-     ]
-    }
-   ],
-   "source": [
-    "(Mouse & 'mouse_id = 100').delete()"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "Calling `delete` method on an *unrestricted* table will attempt to delete the whole table!"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 46,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "About to delete:\n",
-      "`test_`.`session`: 3 items\n",
-      "`test_`.`mouse`: 11 items\n",
-      "Proceed? [yes, No]: No\n",
-      "Cancelled deletes.\n"
-     ]
-    }
-   ],
-   "source": [
-    "Mouse.delete()"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "Notice that when you try to delete all `Mouse`, `delete` also warned that `Session` entries will get deleted! \n",
-    "\n",
-    "DataJoint understands and keeps track of dependencies such that **no dependent entries will be left orphaned**. The `delete` operations automatically **cascades down** the dependency to ensure data integrity. We will revisit this point in the next session."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Joining tables"
+    "## Join (`*`) - gather information from different tables"
    ]
   },
   {
@@ -3950,7 +3872,13 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Projection .proj(): focus on attributes of interest\n",
+    "## Projection (`.proj()`) - focus on attributes of interest"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
     "Beside restriction (`&`) and join (`*`) operations, DataJoint offers another type of operation: projection (`.proj()`). Projection is used to select attributes (columns) from a table, to rename them, or to create new calculated attributes. "
    ]
   },
@@ -4453,7 +4381,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Fetch query results"
+    "# Fetch query results"
    ]
   },
   {
@@ -4755,6 +4683,84 @@
     "(Mouse * Session & {'session_date': '2017-05-15'}).fetch1('KEY')  # \"fetch1()\" because we know there's only one"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Deletion (`.delete()`) - deleting entries and their dependencies"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Now we have a good idea on how to restrict table entries, this is a good time to introduce how to **delete** entries from a table."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To delete a specific entry, you restrict the table down to the target entry, and call `delete` method."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 45,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "About to delete:\n",
+      "`test_`.`mouse`: 1 items\n",
+      "Proceed? [yes, No]: yes\n",
+      "Committed.\n"
+     ]
+    }
+   ],
+   "source": [
+    "(Mouse & 'mouse_id = 100').delete()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Calling `delete` method on an *unrestricted* table will attempt to delete the whole table!"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 46,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "About to delete:\n",
+      "`test_`.`session`: 3 items\n",
+      "`test_`.`mouse`: 11 items\n",
+      "Proceed? [yes, No]: No\n",
+      "Cancelled deletes.\n"
+     ]
+    }
+   ],
+   "source": [
+    "Mouse.delete()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Notice that when you try to delete all `Mouse`, `delete` also warned that `Session` entries will get deleted! \n",
+    "\n",
+    "DataJoint understands and keeps track of dependencies such that **no dependent entries will be left orphaned**. The `delete` operations automatically **cascades down** the dependency to ensure data integrity. We will revisit this point in the next session."
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},