Why Does My SQL Server Date Column Throw Errors, and How Can I Fix It?

How to Utilize the "Date" Datatype in SQL Server

In SQL Server, creating a column with the "Date" datatype can be met with errors. Let's address these issues and explore how to handle dates effectively.

Error during Column Creation

The provided code attempts to create a column named "Order_date" with the "Date" datatype. However, the error arises when entering dates in the MM-DD-YYYY format.

Create table Orders (
Order_ID INT Primary Key,
Book_name varchar(100) ,
isbn varchar(100) ,
Customer_ID INT Foreign key references Customer,
Order_date date,
);

Culture Dependence of Date Literals

The issue stems from the fact that date literals are interpreted based on your system's culture. The MM-DD-YYYY format may be correct for your locale, but it is not universally accepted.

Culture-Independent Date Formats

To avoid such errors, it is crucial to utilize culture-independent date formats. Recommended options include:

• Universal Format: YYYYMMDD (e.g., 20150730 for July 30, 2015)
• ODBC Format: {d'YYYY-MM-DD'} (e.g., {d'2015-07-30'})

Retrieving Date Before a Specified Threshold

To obtain dates before a specific date, use the following query:

SELECT * FROM Orders
WHERE Order_date < '2015-08-02';

Replace '2015-08-02' with the desired threshold date in ISO 8601 format.

Failed Insertion of Subsequent Dates

The error in inserting the fourth and fifth rows is caused by the previous error during column creation. Once the column definition is corrected and the dates are entered in a culture-independent format, all five rows should be inserted successfully.

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