Week 5 Optimizing

Indexes. CREATE INDEX. EXPLAIN QUERY PLAN. Covering Indexes. B-Trees. Partial Indexes. VACUUM. Concurrency. Transactions. ACID: Atomicity, Consistency, Isolation, Durability. BEGIN TRANSACTION. COMMIT. ROLLBACK. Race Conditions. Locks.

How to download lecture source code into Visual Studio Code

  1. Log into cs50.dev.

  2. In your terminal window, type

    wget https://cdn.cs50.net/sql/2023/x/lectures/5/src5.zip

    followed by Enter in order to download a Zip file of lecture’s source code into your codespace.

  3. In your terminal window, type

    unzip src5.zip

    followed by Enter to unzip (i.e., decompress) that Zip file.

  4. In your terminal window, type

    cd src5

    followed by Enter in order to “change directory” into that src5 directory (i.e., folder).

  5. In your terminal window, type, e.g.,

    ls

    followed by Enter in order to see the files.