I have a database with a date/time stamp called dtstatusdatum. I would like to extract statistics from the database...
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
based on this column. What should the select clause look like. I tried:
select count(*) from mytable where dtstatusdatum like '2002-07-29%'
but get no results to the query:
(0) rows affected.
Thanks for mentioning "(0) rows affected" which tells me you're probably working with Microsoft SQL/Server. There are several ways to approach your query, but here's a simple one:
select count(*) from mytable where convert(dtstatusdatum,char(10),120) = '2002-07-29'
See the Microsoft documentation for CAST and CONVERT. Style 120 is the yyyy-mm-dd hh:mm:ss format, and converting to char(10) truncates the time off the end. Thus you can do a straight equality comparison rather than using LIKE.
For More Information
- Dozens more answers to tough SQL questions from Rudy Limeback.
- The Best SQL Web Links: tips, tutorials, scripts, and more.
- Have an SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical SQL questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
Dig Deeper on Oracle and SQL
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.