아쉽게도 interbase를 사용해보진 않았으나, 표준sql 을 쓰시면 될꺼 같습니다.

아래의 문서를 참고해 보세요.

InterBase 6.0 Beta Documentation

• InterBase 6.0 API Guide (.pdf) (.zip) (1.69mb)
• InterBase 6.0 Data Definition Guide (.pdf) (.zip) (1.20mb)
• InterBase 6.0 Developers Guide (.pdf) (.zip) (1.46mb)
• InterBase 6.0 Embedded SQL Guide (.pdf) (.zip) (1.36mb)
• InterBase 6.0 Operations Guide (.pdf) (.zip) (1.45mb)
• InterBase 6.0 Language Reference (.pdf) (.zip) (1.28mb)
• InterBase 6.0 Getting Started (.pdf) (.zip) (0.43mb)
• InterBase 6.0 All of the above (.pdf) (.zip) (8.88mb)
• InterBase 6.0 SQL Reference (.html)