How to fix the Oracle error ORA-18100: XUST0001 – Updating expression in a wrong position?

In this post, you’ll learn more about the Oracle ErrorORA-18100: XUST0001 – Updating expression in a wrong position with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-18100: XUST0001 – Updating expression in a wrong position

Reason for the Error ORA-18100: XUST0001 – Updating expression in a wrong position

An updating expression was used in a position other than one of the following:

– The topmost expression in the body of a query.

– The MODIFY clause of a TRANSFORM expression.

– The RETURN clause of a FLWOR expression.

– The RETURN clauses of a TYPESWITCH expression in which every RETURN clause contains an updating expression, an empty expression ( ), or a call to the fn:error function.

– The THEN and ELSE clauses of a conditional statement in which both the then and else clauses contain either an updating expression, an empty expression ( ), or a call to the fn:error function.

– An operand of a comma expression in which each operand is either an updating expression, an empty expression ( ), or a call to the fn:error function.

– The content of a parenthesized expression.

– The body of a function declaration in which the keyword UPDATING is specified.

How to fix the Error ORA-18100: XUST0001 – Updating expression in a wrong position ?

You can fix this error in Oracle by following the below steps

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