--v$sqltext_with_newlines是v$sqltext等同体，较之易读性强(由sql_address及sql_hash_value唯一确认一个cached cursor中的sql)
SQL> select b.sql_text from v$session a,v$sqltext_with_newlines b where a.sql_address=b.address and a.sql_hash_value=b.hash_value;

SQL_TEXT
----------------------------------------------------------------
re a.sql_address=b.address and a.sql_hash_value=b.hash_value
select b.sql_text from v$session a,v$sqltext_with_newlines b whe

SQL> select b.sql_text from v$session a,v$sqltext_with_newlines b where a.prev_sql_addr=b.address and a.prev_hash_value=b.hash_value and a.sid=145;--用prev找到刚刚执行过的sql

SQL_TEXT
----------------------------------------------------------------
select deptno,dname from test where deptno in(10,20) for update

SQL> /

SQL_TEXT
----------------------------------------------------------------
delete from test

小结
     以后关联查sql就用v$session连接v$sqltext_with_newlines吧，方便快速

     v$sqltext_with_newlines各列含义：address  --sql（cached cursor)的在共享池(library cache)地址,
                                      hash_value --连同上列唯一确定一个cached cursor
                                      sql_id  --cached cursor的标识
                                      command_type  --sql语句类型（select ,insert 等）
                                      piece   --一个大sql会分为好多行，可理解为行号
                                      sql_text  --每个piece的sql内容