Shared Variable

Using Shared Variables

A shared variable can be used in SQL statements in places where we expect or allow a constant. Remember that shared variables are preceded by a colon when so used. Here is an example in which we use the variables of "System Aspects of SQL" Example 1, as components


The most handy way to connect SQL queries to a host language is with a cursor that runs through the tuples of a relation. This relation can be a stored table, or it can be something that is created by a query. To create and use a cursor, we need the following statements: 1. A cursor declaration. The simplest form of a cursor declaration consists of:

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