用 '' '' （两个单引号代替）

比如 ：

sys@LEOdb(194)> select 'alter database tempfile '''||name||''' drop ;' from v$tempfile;

'ALTERDATABASETEMPFILE'''||NAME||'''DROP;'
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alter database tempfile '+DATAC1/LEOdb/tempfile/temp.1461.900841159' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/auims3_tmp.1179.901536643' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/LEO_tmp.913.901536855' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/LEOhis_tmp.915.901536939' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/eimage_tmp.917.901536999' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/webuser_tmp.1475.902157001' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/LEO2_tmp.1477.902157105' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/LEOhis2_tmp.1479.902157169' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/eimage2_tmp.1481.902157567' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/ppf_tmp.1107.947784051' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/tab_livebos_tmp.1100.949074935' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/tab_sdx_tmp.1098.949075105' drop ;
alter database tempfile '+DATAC1/LEOdb/tempfile/tab_stat_tmp.1093.949075261' drop ;
alter database tempfile '+DATAC1/LEOdb/datafile/ostat_tmp.ora' drop ;
alter database tempfile '+DATAC1/LEOdb/datafile/ods_tmp.ora' drop ;
alter database tempfile '+DATAC1/LEOdb/datafile/dreport_tmp.ora' drop ;
alter database tempfile '+DATAC1/LEOdb/datafile/dreport_tmp1.ora' drop ;