On Finer Technology of SQL Inquiry
Hua Tang · 2002
In applying system, especially in joint processing system, the data inquiry and the processing speed have been a criterion in judging applying system. This article briefly elaborates the necessary and importance of finer technology of SQL inquiry . It also explains how to write good inquiring sentences when using SQL sentences in the view of index use. The related sub-inquiry , the usage of ORDER BY sentence and the usage of IN EXISTS etc , in order to enhance the usability of the system.