最主要的是
STORE AS ( disable storage in row ) The minimum storage allocation for an out of line LOB is 1 Database BLOCK per LOB ITEM and may be more if CHUNK is larger than a single block. UNDO is only written for the column locator and LOB INDEX changes
STORE AS ( enable storage in row )Allows LOB data to be stored in the TABLE segment provided it is less than about 4000 bytes Both REDO and UNDO are written for in-line LOBS as they are part of the normal row data.
