check if current date is between two dates oracle sql

## Oracle SQL: Checking if the Current Date is Between Two Dates - A Comprehensive Tutorial

This tutorial provides a detailed guide on how to check if the current date falls between two specified dates in Oracle SQL. We'll explore various methods, considerations, and best practices with illustrative code examples.

**Understanding the Problem:**

The core problem involves comparing the current system date with two other dates: a start date and an end date. We need to determine if the current date is within this date range, inclusive of the start and end dates themselves. This is a common task in many database applications, such as:

* Validating the validity of a record based on date ranges.
* Filtering data within a specific period.
* Determining if an event is currently active.

**Methods for Checking Date Ranges in Oracle SQL:**

Oracle SQL provides several ways to achieve this. We'll explore the most common and efficient approaches.

**1. Using the `BETWEEN` Operator:**

The `BETWEEN` operator is a straightforward and often the most readable method for checking if a value falls within a range.

**Syntax:**

**Explanation:**

* `date_column`: The column containing the date to be checked. In our case, we'll be using `SYSDATE` or `CURRENT_DATE` to represent the current date.
* `start_date`: The starting date of the range (inclusive).
* `end_date`: The ending date of the range (inclusive).

**Example:**

Let's say we have a table called `Promotions` with columns `PromotionID`, `StartDate`, and `EndDate`. We want to find promotions that are active as of the current date.

**Explanation of the Code:**

* `SELECT PromotionID, StartDate, EndDate`: We're selecting the promotion ID, start date, and end date for the matching promotions.
* `FROM Promotions`: We're querying the `Promotions` table.
* `WHERE SYSDATE BETWEEN StartDate AND EndDate`: This is the core of the query. It filters the results to include only those promotions where the current d ...

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