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 | Data Normalisation and ACID  | [1](notes/03-normalisation-acid.md)    | [2](notes/03-normalisation-acid.pdf)    | [3](notes/03-normalisation-acid-hw.pdf)    | [4](mcqs/03-normalisation-acid.md)    |_ | _ |
 | Transactions and Indexes     | [1](notes/04-transactions-indexes.md)  | [2](notes/04-transactions-indexes.pdf)  | [3](notes/04-transactions-indexes-hw.pdf)  | [4](mcqs/04-transactions-indexes.md)  | _ | _ |
 | SQL Primer                   | [1](notes/05-sql-primer.md)            | [2](notes/05-sql-primer.pdf)            | [3](notes/05-sql-primer-hw.pdf)            | [4](mcqs/05-sql-primer.md)            | [5](notes/05-sql-primer-worksheet.md) | [6](notes/05-sql-primer-worksheet-answers.md) |
+| SQL Joins and Aggregation | [1](notes/06-sql-joins-aggregation.md) | [2](notes/06-sql-joins-aggregation.pdf) | [3](notes/06-sql-joins-aggregation-hw.pdf) | [4](mcqs/06-sql-joins-aggregation.md) | [5](notes/06-sql-joins-aggregation-worksheet.md) | [6](notes/06-sql-joins-aggregation-worksheet-answers.md) |
 
 
 ## Assignments