Does ANSI-92 SQL Offer Performance Advantages Over ANSI-89?

SQL: ANSI-92 vs. ANSI-89 – A Performance Perspective

While ANSI-92 SQL offers significant improvements in readability and maintainability over its ANSI-89 predecessor, a common question arises: does it provide any performance advantages?

Performance Analysis: A Closer Look

Research from prominent database experts, such as Gulutzan and Pelzer, indicates that there's no substantial performance difference between ANSI-89 and ANSI-92 join syntax across various database systems. Database management systems (DBMS) typically translate both syntaxes into an internal format before query optimization and execution, minimizing the impact of the original syntax on performance.

Why ANSI-89 Remains Popular

Despite the lack of performance benefits, ANSI-89 syntax continues to be used. This is partly due to the widespread practice of copying and pasting code from older resources, perpetuating the use of the older standard. Habit and familiarity also play a significant role.

The Path Forward: Embracing ANSI-92

Although the transition is gradual, the move towards ANSI-92 is gaining momentum. While changing coding habits takes time, the benefits of improved readability and universal support across all major SQL databases make ANSI-92 the recommended standard. The performance impact is negligible, so the readability and maintainability advantages should be the primary drivers for adoption.

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