Скачать или смотреть Solving the ORA-00917, Missing Comma Error in SQL

Learn how to troubleshoot the `ORA-00917, missing comma` error in SQL with this comprehensive guide tailored for beginners. Discover the common mistakes and how to fix them!
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This video is based on the question https://stackoverflow.com/q/66288483/ asked by the user 'Veritas Curat' ( https://stackoverflow.com/u/15201765/ ) and on the answer https://stackoverflow.com/a/66288527/ provided by the user 'Doug' ( https://stackoverflow.com/u/3192719/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the ORA-00917, Missing Comma Error in SQL: A Beginner's Guide

As a newcomer to SQL and database management systems, it's common to encounter errors that can be frustrating, especially when you're not getting much direct teaching support. One such error you might encounter is the well-known ORA-00917, missing comma error. In this guide, we'll explore what this error means and how you can solve it effectively.

Understanding the ORA-00917 Error

This error typically indicates that there is a syntax issue in your SQL statement. In the context of your SQL code, it usually means that the SQL parser expected to find a comma separating elements, but instead encountered something else that broke the query's structure. A common cause of this error is missing parentheses or incorrect placement of closing brackets in the query.

Example of the Problematic Code

Let's take a look at the SQL code that led to the ORA-00917 error:

[[See Video to Reveal this Text or Code Snippet]]

In this example, the first line seems to be well-structured. However, the VALUES line has a critical oversight: the closing parenthesis for the VALUES statement is missing. This causes the SQL interpreter to confuse the next INSERT statement as part of the previous one.

How to Fix the Error

To resolve the ORA-00917 error, you'll need to correct your SQL statement by ensuring that all elements of the query are properly enclosed with the appropriate syntax. Let's take a closer look at the correct way to structure your SQL insert statements.

Corrected SQL Code

Here's the corrected version of your SQL code:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Made:

Added Closing Parenthesis: Notice the addition of a closing parenthesis at the end of the VALUES line, which closes the insert statement properly.

Consistency in Date Formatting: Make sure to wrap your date strings in single quotes to avoid any parsing issues with the TO_DATE function.

Conclusion

Encountering the ORA-00917, missing comma error can be frustrating, especially for those who are just starting with SQL. By following the tips outlined above and ensuring the proper structure and syntax in your queries, you can troubleshoot and resolve this issue effectively. Remember to double-check your closing brackets and parentheses, as these are often the culprits behind such errors.

With practice and experience, you'll master these common pitfalls and become more confident in writing SQL code. Keep exploring and happy coding!