Local variables are declared using the DECLARE statement, which can be used only within a compound statement (that is, bracketed by the BEGIN and END keywords). Only one variable can be declared for each DECLARE statement in SQL Anywhere.
If the DECLARE is executed within a compound statement, the scope is limited to the compound statement.
The variable is initially set as NULL. The value of the variable can be set using the SET statement, or can be assigned using a SELECT statement with an INTO clause.
The syntax of the DECLARE statement is as follows:
DECLARE variable-name data-type
Local variables can be passed as arguments to procedures, as long as the procedure is called from within the compound statement.
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