From 5d0a3db1e6a53a96735758b6b3a98ca2094fc935 Mon Sep 17 00:00:00 2001 From: Kamran Ahmed Date: Sun, 29 Dec 2024 15:55:51 +0000 Subject: [PATCH] Add temporal validation challenge --- .../lessons/temporal-validation.md | 33 +++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/data/courses/sql/chapters/data-definition-language/lessons/temporal-validation.md diff --git a/src/data/courses/sql/chapters/data-definition-language/lessons/temporal-validation.md b/src/data/courses/sql/chapters/data-definition-language/lessons/temporal-validation.md new file mode 100644 index 000000000..ebf013e71 --- /dev/null +++ b/src/data/courses/sql/chapters/data-definition-language/lessons/temporal-validation.md @@ -0,0 +1,33 @@ +--- +title: Temporal Validation +description: Create a table for event scheduling with temporal constraints +order: 330 +type: challenge +initSteps: [] +expectedResults: + - columns: [message] + values: + - ['Table created successfully'] +--- + +You need to create a table named `events` for events hosted at the bookstore. The table should track event information using appropriate data types and constraints listed below. + +| Column | Data Type | Constraints | +| ---------- | -------------- | ---------------------------------------------------------------------- | +| id | `INTEGER` | Primary Key | +| title | `VARCHAR(100)` | Null values not allowed | +| start_time | `TIMESTAMP` | Null values not allowed. Also ensure `start_time` is always in future. | +| end_time | `TIMESTAMP` | Null values not allowed. Also ensure `end_time` is after `start_time` | +| created_at | `TIMESTAMP` | Not null and default `CURRENT_TIMESTAMP` | + +Please note that you are being tested for your ability to work with temporal data. Make sure to add the following `CHECK` constraints apart from the other constraints mentioned in the table: + +- `start_time` must be in the future +- `end_time` must be after `start_time` +- `created_at` must default to `CURRENT_TIMESTAMP` + +> Also, please note that we are using PostgreSQL for our editor, so make sure to use the appropriate statements. + +## Expected Output + +After executing your query, the table should be created successfully with all specified columns and constraints.