alem-platform · msarvaro · Nov 29, 2024 · Nov 29, 2024 · Nov 29, 2024 · Nov 29, 2024
diff --git a/sql-lt01/README.md b/sql-lt01/README.md
@@ -0,0 +1,33 @@
+# sql-lt01
+
+Status:
+
+    ➕ - task description is done
+    ✅ - ready to prod
+
+| Title                   | Level | XP      | Link                                                 | Done? |
+| ----------------------- | ----- | ------- | ---------------------------------------------------- | ----- |
+| fulls-lt                | 1     | 100     | [README.md](./fulls-lt/README.md)                    | ✅    |
+| track-info              | 1     | 100     | [README.md](./track-info/README.md)                  | ✅    |
+| employee-profile        | 1     | 100     | [README.md](./employee-profile/README.md)            | ✅    |
+| ----------------------- | ----- | ------- | -------------------------------------------------    | ----- |
+| long-ones               | 2     | 150     | [README.md](./long-ones/README.md)                   | ✅    |
+| track-filter            | 2     | 150     | [README.md](./track-filter/README.md)                | ✅    |
+| name-search             | 2     | 150     | [README.md](./name-search/README.md)                 | ✅    |
+| ----------------------- | ----- | ------- | -------------------------------------------------    | ----- |
+| genre-stats             | 3     | 200     | [README.md](./genre-stats/README.md)                 | ✅    |
+| price-summary           | 3     | 200     | [README.md](./price-summary/README.md)               | ✅    |
+| composer-tracks         | 3     | 200     | [README.md](./composer-tracks/README.md)             | ✅    |
+| ----------------------- | ----- | ------- | -------------------------------------------------    | ----- |
+| above-average           | 4     | 250     | [README.md](./above-average/README.md)               | ✅    |
+| genre-max               | 4     | 250     | [README.md](./genre-max/README.md)                   | ✅    |
+| popular-composers       | 4     | 250     | [README.md](./popular-composers/README.md)           | ✅    |
+| ----------------------- | ----- | ------- | -------------------------------------------------    | ----- |
+| album-info              | 5     | 300     | [README.md](./album-info/README.md)                  | ✅    |
+| playlist-genres         | 5     | 300     | [README.md](./playlist-genres/README.md)             | ✅    |
+| ----------------------- | ----- | ------- | -------------------------------------------------    | ----- |
+| playlist-stats          | 6     | 350     | [README.md](./playlist-stats/README.md)              | ✅    |
+| artist-sales            | 6     | 350     | [README.md](./artist-sales/README.md)                | ✅    |
+| ----------------------- | ----- | ------- | -------------------------------------------------    | ----- |
+| customer-artist         | 7     | 400     | [README.md](./customer-artist/README.md)             | ✅    |
+| premium-ones            | 7     | 400     | [README.md](../story07/premium-ones/README.md)       | ✅    |
diff --git a/sql-lt01/above-average/README.md b/sql-lt01/above-average/README.md
@@ -0,0 +1,41 @@
+# above-average
+
+| Expected file |
+| ------------- |
+| `above-average.sql` |
+
+Find all tracks that cost more than average price.
+
+Show for each track:
+- Track's name as `TrackName`
+- Track's price `TrackPrice`
+- Genre name as `Genre`
+
+Note:
+- Only show tracks with price higher than average price of **ALL** tracks
+- Sort the result by track's price in descending order
+
+# Table: `tracks`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `TrackId`      | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `Name`         | NVARCHAR(200) | NOT NULL                            |
+| `AlbumId`      | INTEGER       | FOREIGN KEY REFERENCES `albums(AlbumId)` |
+| `MediaTypeId`  | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `media_types(MediaTypeId)` |
+| `GenreId`      | INTEGER       | FOREIGN KEY REFERENCES `genres(GenreId)` |
+| `Composer`     | NVARCHAR(220) | NULLABLE                            |
+| `Milliseconds` | INTEGER       | NOT NULL                            |
+| `Bytes`        | INTEGER       | NULLABLE                            |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+```
+
+# Table: `genres`
+
+```
+| Column Name | Data Type     | Constraints          |
+|-------------|---------------|----------------------|
+| `GenreId`   | INTEGER       | PRIMARY KEY, AUTOINCREMENT |
+| `Name`      | NVARCHAR(120) | NULLABLE            |
+```
diff --git a/sql-lt01/album-info/README.md b/sql-lt01/album-info/README.md
@@ -0,0 +1,52 @@
+# album-info
+
+| Expected file |
+| ------------- |
+| `album-info.sql` |
+
+Show information about albums and their artists.
+
+Show:
+- Album title as `AlbumTitle`
+- Artist name as `Artist`
+- Number of tracks as `TrackCount`
+- Total price of all tracks as `TotalPrice`, rounded to 2 decimals
+
+Note:
+- Include only albums that have at least 5 tracks
+- Sort the result by number of tracks in descending order
+
+# Table: `artists`
+
+```
+| Column Name | Data Type   | Constraints          |
+|-------------|-------------|----------------------|
+| `ArtistId`  | INTEGER     | PRIMARY KEY, AUTOINCREMENT |
+| `Name`      | NVARCHAR(120) | NULLABLE          |
+```
+
+# Table: `albums`
+
+```
+| Column Name | Data Type   | Constraints                           |
+|-------------|-------------|---------------------------------------|
+| `AlbumId`   | INTEGER     | PRIMARY KEY, AUTOINCREMENT           |
+| `Title`     | NVARCHAR(160) | NOT NULL                          |
+| `ArtistId`  | INTEGER     | NOT NULL, FOREIGN KEY REFERENCES `artists(ArtistId)` |
+```
+
+# Table: `tracks`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `TrackId`      | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `Name`         | NVARCHAR(200) | NOT NULL                            |
+| `AlbumId`      | INTEGER       | FOREIGN KEY REFERENCES `albums(AlbumId)` |
+| `MediaTypeId`  | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `media_types(MediaTypeId)` |
+| `GenreId`      | INTEGER       | FOREIGN KEY REFERENCES `genres(GenreId)` |
+| `Composer`     | NVARCHAR(220) | NULLABLE                            |
+| `Milliseconds` | INTEGER       | NOT NULL                            |
+| `Bytes`        | INTEGER       | NULLABLE                            |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+```
diff --git a/sql-lt01/artist-sales/README.md b/sql-lt01/artist-sales/README.md
@@ -0,0 +1,67 @@
+# artist-sales
+
+| Expected file |
+| ------------- |
+| `artist-sales.sql` |
+
+Find sales statistics for each artist.
+
+Note:
+- Only include artists with the price of their tracks equal to most expensive track of that track among their albums
+- Most expensive track has highest `UnitPrice`
+- Only include artists whose total revenue is more than `$50`
+- Calculate total revenue as sum of (`UnitPrice` × `Quantity`)
+- Sort result by a total revenue in descending order
+
+Show for each artist:
+- Artist name as `ArtistName`
+- Name as `TopTrack`
+- Track price as `TrackPrice`
+- Total amount of money spent as `TotalRevenue`, rounded to 2 decimals
+
+# Table: `artists`
+
+```
+| Column Name | Data Type   | Constraints          |
+|-------------|-------------|----------------------|
+| `ArtistId`  | INTEGER     | PRIMARY KEY, AUTOINCREMENT |
+| `Name`      | NVARCHAR(120) | NULLABLE          |
+```
+
+# Table: `albums`
+
+```
+| Column Name | Data Type   | Constraints                           |
+|-------------|-------------|---------------------------------------|
+| `AlbumId`   | INTEGER     | PRIMARY KEY, AUTOINCREMENT           |
+| `Title`     | NVARCHAR(160) | NOT NULL                          |
+| `ArtistId`  | INTEGER     | NOT NULL, FOREIGN KEY REFERENCES `artists(ArtistId)` |
+```
+
+# Table: `tracks`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `TrackId`      | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `Name`         | NVARCHAR(200) | NOT NULL                            |
+| `AlbumId`      | INTEGER       | FOREIGN KEY REFERENCES `albums(AlbumId)` |
+| `MediaTypeId`  | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `media_types(MediaTypeId)` |
+| `GenreId`      | INTEGER       | FOREIGN KEY REFERENCES `genres(GenreId)` |
+| `Composer`     | NVARCHAR(220) | NULLABLE                            |
+| `Milliseconds` | INTEGER       | NOT NULL                            |
+| `Bytes`        | INTEGER       | NULLABLE                            |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+```
+
+# Table: `invoice_items`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `InvoiceLineId`| INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `InvoiceId`    | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `invoices(InvoiceId)` |
+| `TrackId`      | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `tracks(TrackId)` |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+| `Quantity`     | INTEGER       | NOT NULL                            |
+```
diff --git a/sql-lt01/composer-tracks/README.md b/sql-lt01/composer-tracks/README.md
@@ -0,0 +1,34 @@
+# composer-tracks
+
+| Expected file |
+| ------------- |
+| `composer-tracks.sql` |
+
+Find composers who wrote more than `10` tracks.
+
+Show:
+
+- Composer's name as it is
+- Number of their tracks as `TrackCount`
+
+Note:
+
+- Skip composers that are `NULL`, so the composer `IS NOT NULL`
+- Only show composers with more than 10 tracks
+- Sort the result by number of tracks in descending order
+
+# Table: `tracks`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `TrackId`      | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `Name`         | NVARCHAR(200) | NOT NULL                            |
+| `AlbumId`      | INTEGER       | FOREIGN KEY REFERENCES `albums(AlbumId)` |
+| `MediaTypeId`  | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `media_types(MediaTypeId)` |
+| `GenreId`      | INTEGER       | FOREIGN KEY REFERENCES `genres(GenreId)` |
+| `Composer`     | NVARCHAR(220) | NULLABLE                            |
+| `Milliseconds` | INTEGER       | NOT NULL                            |
+| `Bytes`        | INTEGER       | NULLABLE                            |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+```
diff --git a/sql-lt01/customer-artist/README.md b/sql-lt01/customer-artist/README.md
@@ -0,0 +1,112 @@
+# customer-artist
+
+| Expected file |
+| ------------- |
+| `customer-artist.sql` |
+
+Find customers' favorite artists based on purchase history.
+
+For each customer and artist combination (customer and artist ids) calculate:
+1. How many of artist's tracks customer bought
+2. Total amount spent on this artist's tracks
+3. What percentage of customer's total purchases these tracks represent
+4. Number of **unique** albums bought from
+
+Then show:
+- Customer's full name (first and last names separated by single space) as `Customer`
+- Artist name as `ArtistName`
+- Number of tracks bought as `TrackCount`
+- Total spent on artist as `TotalSpent`, rounded to 2 decimal places
+- Percentage of all purchases as `Percentage`, rounded to 1 decimal place
+- Number of **unique** albums as `AlbumCount`
+
+Where:
+- Only include customers who spent more than `$40` in total
+- Only show artists that make up more than `5%` of customer's purchases
+
+Note:
+- Calculate total spent as UnitPrice × Quantity from invoice_items
+- Sort the result by customer name in ascending order, then by total spent descending order
+
+# Table: `artists`
+
+```
+| Column Name | Data Type   | Constraints          |
+|-------------|-------------|----------------------|
+| `ArtistId`  | INTEGER     | PRIMARY KEY, AUTOINCREMENT |
+| `Name`      | NVARCHAR(120) | NULLABLE          |
+```
+
+# Table: `albums`
+
+```
+| Column Name | Data Type   | Constraints                           |
+|-------------|-------------|---------------------------------------|
+| `AlbumId`   | INTEGER     | PRIMARY KEY, AUTOINCREMENT           |
+| `Title`     | NVARCHAR(160) | NOT NULL                          |
+| `ArtistId`  | INTEGER     | NOT NULL, FOREIGN KEY REFERENCES `artists(ArtistId)` |
+```
+
+# Table: `customers`
+
+```
+| Column Name   | Data Type     | Constraints                           |
+|---------------|---------------|---------------------------------------|
+| `CustomerId`  | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `FirstName`   | NVARCHAR(40)  | NOT NULL                            |
+| `LastName`    | NVARCHAR(20)  | NOT NULL                            |
+| `Company`     | NVARCHAR(80)  | NULLABLE                            |
+| `Address`     | NVARCHAR(70)  | NULLABLE                            |
+| `City`        | NVARCHAR(40)  | NULLABLE                            |
+| `State`       | NVARCHAR(40)  | NULLABLE                            |
+| `Country`     | NVARCHAR(40)  | NULLABLE                            |
+| `PostalCode`  | NVARCHAR(10)  | NULLABLE                            |
+| `Phone`       | NVARCHAR(24)  | NULLABLE                            |
+| `Fax`         | NVARCHAR(24)  | NULLABLE                            |
+| `Email`       | NVARCHAR(60)  | NOT NULL                            |
+| `SupportRepId`| INTEGER       | FOREIGN KEY REFERENCES `employees(EmployeeId)` |
+```
+
+# Table: `invoices`
+
+```
+| Column Name        | Data Type     | Constraints                           |
+|--------------------|---------------|---------------------------------------|
+| `InvoiceId`        | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `CustomerId`       | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `customers(CustomerId)` |
+| `InvoiceDate`      | DATETIME      | NOT NULL                            |
+| `BillingAddress`   | NVARCHAR(70)  | NULLABLE                            |
+| `BillingCity`      | NVARCHAR(40)  | NULLABLE                            |
+| `BillingState`     | NVARCHAR(40)  | NULLABLE                            |
+| `BillingCountry`   | NVARCHAR(40)  | NULLABLE                            |
+| `BillingPostalCode`| NVARCHAR(10)  | NULLABLE                            |
+| `Total`            | NUMERIC(10,2) | NOT NULL                            |
+```
+
+# Table: `tracks`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `TrackId`      | INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `Name`         | NVARCHAR(200) | NOT NULL                            |
+| `AlbumId`      | INTEGER       | FOREIGN KEY REFERENCES `albums(AlbumId)` |
+| `MediaTypeId`  | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `media_types(MediaTypeId)` |
+| `GenreId`      | INTEGER       | FOREIGN KEY REFERENCES `genres(GenreId)` |
+| `Composer`     | NVARCHAR(220) | NULLABLE                            |
+| `Milliseconds` | INTEGER       | NOT NULL                            |
+| `Bytes`        | INTEGER       | NULLABLE                            |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+```
+
+# Table: `invoice_items`
+
+```
+| Column Name    | Data Type     | Constraints                           |
+|----------------|---------------|---------------------------------------|
+| `InvoiceLineId`| INTEGER       | PRIMARY KEY, AUTOINCREMENT           |
+| `InvoiceId`    | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `invoices(InvoiceId)` |
+| `TrackId`      | INTEGER       | NOT NULL, FOREIGN KEY REFERENCES `tracks(TrackId)` |
+| `UnitPrice`    | NUMERIC(10,2) | NOT NULL                            |
+| `Quantity`     | INTEGER       | NOT NULL                            |
+```
diff --git a/sql-lt01/employee-profile/README.md b/sql-lt01/employee-profile/README.md
@@ -0,0 +1,35 @@
+# employee-profile
+
+| Expected file             |
+| ------------------------- |
+| `employee-profile.sql`        |
+
+Display employee's contact information where show their:
+
+- last name
+- email 
+- country
+
+Sort result by last name in ascending order
+
+# Table: `employees`
+
+```
+| Column Name  | Data Type   | Constraints                           |
+|--------------|-------------|---------------------------------------|
+| `EmployeeId` | INTEGER     | PRIMARY KEY, AUTOINCREMENT           |
+| `LastName`   | NVARCHAR(20) | NOT NULL                           |
+| `FirstName`  | NVARCHAR(20) | NOT NULL                           |
+| `Title`      | NVARCHAR(30) | NULLABLE                           |
+| `ReportsTo`  | INTEGER     | FOREIGN KEY REFERENCES `employees(EmployeeId)` |
+| `BirthDate`  | DATETIME    | NULLABLE                            |
+| `HireDate`   | DATETIME    | NULLABLE                            |
+| `Address`    | NVARCHAR(70) | NULLABLE                           |
+| `City`       | NVARCHAR(40) | NULLABLE                           |
+| `State`      | NVARCHAR(40) | NULLABLE                           |
+| `Country`    | NVARCHAR(40) | NULLABLE                           |
+| `PostalCode` | NVARCHAR(10) | NULLABLE                           |
+| `Phone`      | NVARCHAR(24) | NULLABLE                           |
+| `Fax`        | NVARCHAR(24) | NULLABLE                           |
+| `Email`      | NVARCHAR(60) | NULLABLE                           |
+```