Introduction to SQL

Kursinnehåll

Introduction to SQL

Introduction to SQL

1. Getting Started

What is SQL?Setting Up SQL and SSMS Getting Familiar with SSMS Structure of an SQL Database System The SELECT Statement Challenge: First Day as a Librarian Challenge: Find all Book Titles Challenge: Find Book Titles and Authors The DISTINCT Keyword Challenge: Find all Genres

2. Filtering Data

The WHERE Clause Challenge: Help a Reader Find Their Favorite Genre Challenge: Fetching Older Books Conditional Expressions: Comparison Operators Challenge: Avoid the Damaged Books Challenge: Highlight New Arrivals Challenge: Budget-Friendly Books Conditional Expressions: The AND Operator Challenge: Find Specific Books for a Reader Challenge: Defining Ranges Challenge: Multiple Conditions Conditional Expressions: The OR Operator Challenge: Matching Multiple Options Challenge: Excluding A Range Conditional Expressions: The NOT Operator Challenge: Negating a Range

3. Sorting Data

Basic Sorting Challenge: Sorting the Library Catalogue Sorting by Multiple Columns Challenge: Further Sorting the Catalogue Sorting after Filtering Data Challenge: Find the Cheapest Books Challenge: Help a Customer Find a Book The LIMIT Keyword Challenge: Select Books for the Collector's Section Challenge: Affordable Books

4. Populating a Database

Creating a Table Challenge: Creating a new Books Table Inserting Rows into a Table Challenge: Inserting Data Challenge: Inserting More Data Inserting Multiple Rows Challenge: Inserting Bulk Data Primary Keys The SERIAL Keyword Challenge: Changing the Books Structure Specifying Default Values Challenge: Further Improving the Books Table

5. Updating & Deleting Data

Updating Rows in a Table Challenge: Correct Book's Data Challenge: Updating Page Counts Challenge: Mark Archived Books As Unavailable Deleting Rows Challenge: Deleting Outdated Records Duplicating Tables Challenge: Create a Table Backup Challenge: Generate a Summarized Books Table Deleting Tables

Challenge: Deleting Outdated Records

Recently, the library donated some of its antique books to a charity organization to make space for new collections. However, the records of these books are still present in the database, which needs to be cleaned up.

These books meet the following criteria:

They were published before the year 1900;
They are marked as unavailable (is_available = FALSE) since they are no longer in the library's possession.

Uppgift

Swipe to start coding

Your task is to write a DELETE statement to remove these outdated records from the books table.

Lösning

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 5. Kapitel 6

toggle bottom row

Challenge: Deleting Outdated Records

Recently, the library donated some of its antique books to a charity organization to make space for new collections. However, the records of these books are still present in the database, which needs to be cleaned up.

These books meet the following criteria:

They were published before the year 1900;
They are marked as unavailable (is_available = FALSE) since they are no longer in the library's possession.

Uppgift

Swipe to start coding

Your task is to write a DELETE statement to remove these outdated records from the books table.

Lösning

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 5. Kapitel 6

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

some-alt