This is the first book available on SQL/DS, the IBM relational database management system for the VM and VSE environments. It is already one of the most successful database products and is gaining increasing importance, given the accelerating acceptance of the VM environment in the marketplace.The question of the effect of nulls on comparisons is discussed further in Chapter 6. One final point: In certain contextsa but not in general scalar expres- *The effect of nulls on aggregate functions such as SUM is discussed in Chapter 7. sionsanbsp;...
|Title||:||A Guide to SQL/DS|
|Author||:||C. J. Date|
|Publisher||:||Addison Wesley Publishing Company - 1989-01-01|