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Keyword &Parameter Description:
index_name:
This is an undeclared identifier which can be referenced only within the FORALL statement and only as the collection subscript.
The implicit declaration of the index_name overrides any other declaration outside the loop. Therefore, another variable with similar name cannot be referenced inside the statement. Inside a FORALL statement, the index_name cannot appear in the expressions and cannot be assigned a value.
lower_bound .. upper_bound:
These are the expressions which must yield integer values and should specify a valid range of the consecutive index numbers. The expressions are computed only when the FORALL statement is initially entered.
The index is assigned a value of the lower_bound. If that value is not bigger than the value of the upper_bound, the SQL statement is executed, and then the index is incremented. If the value of the index is still not bigger than the value of upper_ bound, then the SQL statement is executed again. This procedure repeats until the value of the index is bigger than the value of the upper_bound. At that point, the FORALL statement is completed.
sql_statement:
This must be an INSERT, DELETE, & UPDATE statement that references the collection of all elements.
Using the Collection Methods The collection methods below help to generalize the code and make collections easier to use and also make your applications easier to maintain:
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