Oracle Error PLS-00363: Expression Cannot Be Used as Assignment Target - Solution & Explanation

The error "PLS-00363: expression 'A' cannot be used as an assignment target" in Oracle indicates that you are trying to assign a value to an expression that cannot be assigned. \n\nIn Oracle PL/SQL, an assignment target can be a variable, a record, an element of an array, or an attribute of an object. However, it cannot be a constant or a literal value. \n\nTo resolve this error, you need to make sure that the assignment target is a valid variable, record, array element, or object attribute. Double-check the expression you are trying to assign a value to and ensure that it is a valid assignment target. \n\nHere's an example of the error and its resolution: \n\nsql\nDECLARE\nA CONSTANT NUMBER := 10;\nBEGIN\nA := 20; -- This will result in PLS-00363 error\nEND;\n\n\nTo fix the error, you can declare a variable and assign the constant value to it: \n\nsql\nDECLARE\nA CONSTANT NUMBER := 10;\nB NUMBER;\nBEGIN\nB := A; -- Assign the constant value to a variable\nDBMS_OUTPUT.PUT_LINE(B); -- Output: 10\nEND;\n\n\nIn this example, the constant value 'A' is assigned to the variable 'B', which is a valid assignment target.