doc(cis105): add course lecture note for chapter 17 on more sql statement and clauses specifically with join & on query selector for table linking & add corresponded affiliated sidebar hyperlink component entry for quick access

docs/.vitepress/config/sidebar.ts

@@ -237,6 +237,10 @@ export const sidebar: DefaultTheme.Config['sidebar'] = {
                 {
                     text: 'Lect 16: Information Technology Careers',
                     link: '/academic/cis105/cis105-l16-lecture-note'
+                },
+                {
+                    text: 'Lect 17: SQL Clauses: JOIN Query',
+                    link: '/academic/cis105/cis105-l17-lecture-note'
                 }
             ],
         },

docs/academic/cis105/cis105-l17-lecture-note.md

@@ -0,0 +1,30 @@
+# CIS105: Computer Applications & Information Systems Lect. 17
+
+## Chapter 17: SQL Clauses: `JOIN` Query
+
+### 17.1: `JOIN` & `ON` Clauses
+
+- `JOIN`: Join tables together to connect multiple fields into 1 query.
+- `ON`: Linking the primary and foreign key
+- Linking formula: `FROM table1 + JOIN table2 ON table1.primarykey = table2.foreignkey`
+
+```sql
+SELECT first_name, last_name, link_to_major, major_id, major_name
+	FROM member
+	JOIN major
+		ON member. link_to_major = major.major_id
+```
+
+### 17.2: SQL Statements: Primary vs. Foreign Keys
+
+- Primary key: A field on a database table that uniquely identifies each row of the table.
+- Foreign key: is used to combine the rows from one table wit the rows of another table.
+
+### 17.3: SQL Statement: Date & Time Formatting
+
+- The common conventional format of SQL date & time searching is as followed, in form of `YEAR-MONTH-DATT12:00:00`
+
+  - ```sql
+    '2022-04-17T12:00:00'
+    ```
+