Web Reference: Every PL/SQL constant, variable, parameter, and function return value has a data type that determines its storage format and its valid values and operations. This chapter explains scalar data types, which store values with no internal components. A scalar data type can have subtypes. Choose the wrong one, and you risk performance issues, data loss, or hard-to-debug errors. Let’s break down the main categories of PL/SQL data types and how to use them effectively. Jul 23, 2025 · In this article, We will learn about subtypes of data types of PL/SQL, namely scalar types, numeric types, character types, Boolean types, date and time types, large objects, and a type by user-defined subtypes.
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