table_name [(column_list)]The column names define the mapping between columns in the table and columns in the bulk data file. The column names can also indicate which columns are External ID columns. See SQL Statements and Extensions for the Salesforce Driver for more information.table_name (column_list)table_name (column_list)UPDATE table_name SET <update column> = ? … WHERE <ID column> = ? …table_name (column_list)is the same as for INSERT except that at least one of the columns must be identified as an external ID (see BULK_OPERATION_INSERT).
◦ extIdColumn EXT_IDwhere extIdColumn is the column that is checked to determine whether the row already exists in the database.See Specifying an External ID Column for more information.
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