Should SQL Keywords Be Uppercase or Lowercase for Better Readability?

Upper Case for SQL Keywords: A Matter of Readability

When it comes to SQL syntax, the question of whether to use upper case for keywords has been a hot debate. While the default is upper case, some developers prefer lower case for better readability. Let's explore the reasons behind each approach.

Arguments for Upper Case

Initially, upper case was the norm because traditional database management systems (DBMS) like SQL Server displayed keywords in upper case. This led many developers to adopt the practice of using upper case for greater consistency.

Arguments for Lower Case

Proponents of lower case argue that it enhances readability by reducing the visual clutter created by all-caps text. Mixed case also allows literals and comments to stand out more clearly, making code easier to parse and understand.

Personal Preferences

Ultimately, the decision of whether to use upper or lower case for SQL keywords comes down to personal preferences. Some developers assert that upper case reminds them of legacy programming languages and makes code seem more aggressive. Others prefer lower case for its readability and ease of use.

Conclusion

While there is no inherently better style when it comes to using upper or lower case for SQL keywords, readability should be the guiding principle. Developers who find all-uppercase text difficult to read may prefer lower case, while those who appreciate a consistent look and feel may opt for upper case. The choice ultimately rests with the developer based on their own preferences and the project's specific requirements.

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