Using SUBSTR with interactive SQL

215 pts.
Tags:
AS/400
SQL
I am trying to change part of a field using the substring command in interactive SQL. To do this I entered the following:

UPDATE LIBRARY/FILE_NAME SET SUBSTR(FIELD_NAME1,194,4) = 'XXXXX' WHERE FIELD_NAME2 = 99999 


I get the error token ( was not valid. Valid tokens: = .' Obviously there is a syntax error but O cannot figure it out.

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Unless something has changed SUBSTR cannot be used as the target of set. It can however be used as part of the expression setting the variable. Try:

UPDATE LIBRARY/FILE_NAME SET FIELD_NAME1 = SUBSTR(FIELD_NAME1,1,193) || 'XXXX' || SUBSTR(FIELD_NAME1,198) WHERE FIELD_NAME2 = 99999

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