5092309e_SQL_Statements__Description
[Parameter] Expression1 [Description] 
Any expression that does not contain an aggregate function. The expression is evaluated for each row qualifying for the update operation. The data type of the expression must be compatible with the data type of the updated column. Expression1 can specify a column or sequence CURRVAL or NEXTVAL reference when updating values. See "Incrementing SEQUENCE values with CURRVAL and NEXTVAL" for more details.
SQL Statements