REFERENCING { { OLD | NEW } [ ROW ] [ AS ] correlation-Name [ { OLD | NEW } [ ROW ] [ AS ] correlation-Name ] | { OLD TABLE | NEW TABLE } [ AS ] Identifier [ { OLD TABLE | NEW TABLE } [AS] Identifier ] | { OLD_TABLE | NEW_TABLE } [ AS ] Identifier [ { OLD_TABLE | NEW_TABLE } [AS] Identifier ] } OLD_TABLE | NEW_TABLEは、後方互換性及びDB2との互換性のための構文です。これはSQL標準に沿っていないので非推奨です。