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Comparison Operators
Usually, you use the comparison operators in the WHERE clause of a data manipulation statement to form the predicates, that compare one expression to another and always yields the TRUE, FALSE, or NULL. You can use all the comparison operators listed below to form the predicates. Furthermore, you can merge predicates using the logical operators AND, OR, & NOT.
Control Structures The Control structures are the most important PL/SQL extension to the SQL. Not only does PL/SQL let you manipulate Oracle data, it lets you process the data
1. Create a procedure called TAX_COST_SP to accomplish the tax calculation task. Keep in mind that the state and subtotal values are inputs into the procedure and the procedure is
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