SQL Working With Dates
SQL Working With Dates
Working with dates in SQL is a common task in database management. Here are some examples of how to work with dates in SQL:
- Retrieving records between two dates:
To retrieve records between two dates, you can use the BETWEEN operator. For example, to retrieve all records between January 1, 2022, and March 31, 2022:
SELECT * FROM table_name WHERE date_column BETWEEN '2022-01-01' AND '2022-03-31';
- Extracting parts of a date:
To extract parts of a date, you can use the DATEPART function in SQL. For example, to retrieve the year from a date column:
SELECT DATEPART(year, date_column) as year FROM table_name;
- Formatting dates:
To format dates in SQL, you can use the CONVERT function. For example, to convert a date column to a string in the format ‘yyyy-mm-dd’:
SELECT CONVERT(varchar, date_column, 23) as formatted_date FROM table_name;
- Adding or subtracting dates:
To add or subtract days, months, or years from a date column, you can use the DATEADD function in SQL. For example, to add 30 days to a date column:
SELECT DATEADD(day, 30, date_column) as new_date FROM table_name;
- Finding the difference between two dates:
To find the difference between two dates, you can use the DATEDIFF function. For example, to find the number of days between two dates:
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SELECT DATEDIFF(day, start_date_column, end_date_column) as days_diff FROM table_name;
These are just a few examples of how to work with dates in SQL. The specific syntax and functions used may vary depending on the database system you are using.