看到很多高手在写学习笔记，我也留下自己的一点点脚印吧

06Jul2012:
XPORT engine


CAUTION: Do not omit the MEMTYPE=DATA option. Otherwise, SAS attempts to copy the entire contents of the library (including catalogs and views) to the transport file. The XPORT engine does not support the CATALOG or the VIEW member type. Error and warning messages are written to the SAS log.  

13Jul2012: import file - infile
DSD DLM='';
FORMAT;
INPUT;

10Aug2012:
read first non-missing value:
COALESCEC
COALESCE