Is used to specify that the column specified by ext_id_column is used to look up the rowid to be inserted into the column specified by column_name.The following example uses a list of expressions to insert records. Each Insert statement adds one record to the database table. In this case, one record is added to the table emp. Values are specified for five columns. The remaining columns in the table are assigned the default value or NULL if no default value is specified.The following example uses a list of expressions to insert records and specifies an external ID column (a foreign key column) named accountId that references a table that has an external ID column named AccountNum.
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